KN Magazine: Articles
The Myth of the Untraceable Poison
Is there such a thing as an untraceable poison? DP Lyle unpacks the medical myths and forensic realities behind poison detection in dead bodies. From screening tests to cunning killers, learn how the science of toxicology shapes great crime fiction.
By DP Lyle
One of the most common questions I get from writers is: Is there a poison that can’t be found in a corpse? The answer is No. And Yes.
Much depends on the state of the corpse when it is found. If severely decayed or completely skeletonized, the ME and the forensic toxicologist have their hands tied. Mostly. There are some toxins, such as the heavy metals (Mercury, Lead, and Arsenic are common ones), that can be found in bones and hair. But most toxins can’t be found in corpses that are severely decayed or simply bones.
In a more or less intact body, your villain can still get away with the murder by poison. That is, until your clever sleuth figures out that something is amiss and solves the crime.
The first thing your murderer must consider is how to make the poisoning look like something else. An example would be an elderly person with heart and lung disease who dies in his sleep. In this case, the person's private physician would sign the death certificate as a natural cardiac death and, almost always, the ME will accept it. Why? Because there is an old adage in medicine that says: Common things occur commonly. Most people who die in this situation do indeed die from natural causes, so searching for something more sinister would be neither logical nor practical. If the ME accepted the private physician’s cause of death, no autopsy would be done, and no toxicological examinations would be undertaken. An overdose of Morphine or digitalis or arsenic or anything else would go undetected.
Unless someone asked questions. Maybe a high-dollar inheritance or insurance policy is in play. If an inheritance, one family member could suspect another and ask questions. In the case of a large insurance policy, the insurance company would look under every stone before paying off the policy. Or your sleuth could have some reason to suspect that things are not as they seem. In any of these situations, the ME might be moved to open a file and investigate.
But if your killer is clever, he might be able to keep the ME completely out of the picture or at least give him an easy answer for the cause of death. If no murder is suspected, he'll take the path of least resistance, which is also the cheapest route. Remember, he must live with and justify his budget annually. If he is wasteful, he'll be looking for a job. So, give him a cheap and easy out. Your sleuth will then have to battle the ME to get the case re-opened.
The second thing a clever poisoner can do is to use a poison that is not readily detectable and will slip through most drug screens. Toxicology testing follows a two-tiered approach. Screening Tests, which are easier, faster, and cheaper, are used to identify common classes of drugs such as narcotics or amphetamines. This only tells the ME and toxicologist that some type of narcotic or amphetamine is present, but not which one. Determining which one requires more sophisticated, time-consuming, and expensive Confirmatory Testing. And if the screening tests are normal, no further testing is warranted and the ME would not spend the time and money to go further down that road.
Drug screens typically test for alcohol, narcotics, sedatives, marijuana, cocaine, amphetamines, and aspirin. Some screen for a few other classes. Once a member of a class is identified, then confirmatory testing will determine exactly which member of the class is present and in what amount. For example, if narcotic is found in the screen, further testing might show that the actual narcotic present is morphine. Or an amphetamine might be further analyzed, and this might show that methamphetamine is the culprit.
Your poisoner could use a poison that would not be found in the typical screen. Things such as arsenic, selenium, and most plants (oleander, deadly nightshade, etc.) do not show up on the typical tox screen, and when the screen comes back negative, the ME might not go further. Why would he spend the time and money without a good reason? This is where your sleuth steps in to shake things up.
But, if a poison is suspected and if the funds and interest to pursue it are present, anything can be found in an intact corpse. Using gas chromatography in conjunction with either mass spectrometry (GS/MS) or infrared spectroscopy (GC/IR) will give a chemical fingerprint for any molecule. And since each molecule has its own structure and thus its own fingerprint, every compound can be distinguished from every other one.
To write a good mystery that will keep the reader guessing to the end, you must plot the nearly perfect murder. This way when your sleuth cracks the case, he or she will be a true hero. If poisoning is your killer’s chosen weapon, then use the above principles to make your plot as clever and convoluted as possible. Have your killer mask the death as natural or use some poison that is not readily detectable in screening tests and then your sleuth must be very clever to solve the case.
There are several sources for you to search out poisons and to discover how they act and how they are identified. Google, of course, and try plugging into your state poison control center. My books, Forensic For Dummies, Murder and Mayhem, and Forensics and Fiction cover a number of poisons. I also recommend Howdunnit: Book of Poisons by Serita Stevens and Anne Bannon from Writers’ Digest Books. It is a great resource for poisons of all types.
What if?: A Most Important Question
Every author is asked where they get their ideas. This post explores how an idea transforms into a full story, starting with the crucial question: What if? It’s the foundation of every gripping narrative.
By DP Lyle
Every author has been asked: Where do you get your ideas? The short answer is: Everywhere. Something you see or read germinates an idea, and a story unfolds. Sometimes the story comes together quickly, but most often weeks of building mental scenes and snippets of dialog, setting, and action must be waded through before pen meets paper.
An overheard conversation might be the spark. Or a couple talking/arguing/laughing at a nearby restaurant table. Maybe an odd character strolling down the street. Perhaps an idea simply pops into your head from wherever those thoughts arise.
Okay, so you have an idea. Now what? An idea isn’t a story. Ideas are a dime a dozen. They are literally everywhere. The key is to find an idea that can stand up through a 100,000-word manuscript. No small trick.
To do this, the original idea must be refined and fleshed out. An idea can become a scene, but to be a full-length novel it must evolve and expand. It must become a premise, or what many call “The Central Story Question.” It’s what the story is really about.
To become a premise, the original idea must ultimately lead to the question: What if?
What if this happened? What if that person did this? What if that dude in the shabby clothes was actually a rogue undercover agent with a deadly agenda? What if the restaurant couple was planning a murder? What if that briefcase contained state secrets? Or an explosive device? Or a deadly virus?
From those two words--What if?--stories arise.
The power of your story’s What If? can’t be overestimated. If it is done correctly and not lost in the writing. A good What if? states the main character, the situation, the stakes, and, most importantly, the Central Story Question.
It is the answering of this question that is the story.
Okay, so our restaurant couple is planning a murder. Who, what, when, where, and, most importantly, why? It’s always the why that makes a great story. Is it to get out of a messy marriage and save all that alimony money, or to cash in that million-dollar insurance policy, or to cover an embezzlement from a company they work for, or to seek revenge for some act? Even though the original idea was a couple planning a murder, each of these scenarios generates a different story. Each will lead your sleuth, who must solve the murder, into a different world.
What if a young couple witnesses a murder and in so doing put themselves in the cross hairs of a transnational criminal organization?
This is the What If? for my latest Cain/Harper thriller, TUNICA.
The What If? should be stated in about 25 words or less. Because the What If? is brief, it’s often called the elevator pitch or the agent pitch. It communicates your story in the most efficient terms. We’ve all heard writers respond when asked what their story is about by saying things like, “Well, there’s this guy who lives on an island. And he hates the water. And a big shark is killing people and this is threatening to shut down the town’s beaches on a holiday weekend. And then there’s this other guy who is a shark expert and he has a really cool boat. Oh, I forgot, the first guy is the chief of police.” Yawn.
What if a hydrophobic, island-community police chief must go out on the water to kill a predatory shark to save the town’s summer economy and to prove his own self-worth?
What if an FBI trainee must exchange personal information with a sadistic serial killer in order to track another serial killer and save a Senator’s daughter?
What if the youngest son of a mafia family takes revenge on the men who shot his father and becomes the new godfather, losing his own soul in the process?
These are of course Jaws, Silence of the Lambs, and The Godfather, respectively. See how these What If?s reveal the protagonist and cleanly state the story premise? Read these books or watch the movies and you will see that each scene moves toward answering the story’s What If? Each of your scenes should, too. If not, consider cutting, or at least reworking, those that don’t.
Many authors consume weeks creating the What If? for their story. Constantly refining it, making it more on point. You should, too. It’s that important. It concisely states the Central Story Question.
Here’s a tip: When your What If? is completed to your satisfaction, print it out and tape it to your computer or the front of your writing pad so you will see it every time you sit down to write. Before writing each scene, read your What If? and ask yourself, “Does this scene help answer the Central Story Question?” If you do this, you will never lose sight of what your story is about. Particularly in the dreaded middle, where so many stories get lost in the jumble of character and backstory and cool dialog all the other stuff that goes into a manuscript. The What If? keeps you focused and on track.
Ten Medical and Forensic Mistakes Writers Should Never Make
Writers often make medical and forensic mistakes that can undermine the credibility of their stories. From the "quick death" to the "instant athlete," this guide outlines common errors in crime writing and how to avoid them.
Writers make mistakes. An anachronism here, a blunder in logic there, departures from common sense everywhere, and of course the all-too-common break from real world possibilities that plagues even the most well-written story. It’s part of the process. Sitting alone, bouncing clever ideas off your computer screen offers little feedback. But readers notice such breaches. They shake their heads, close the book, snuff out the light, and go to sleep. Not the ringing endorsement you wished for. Here are some of the most common medical and forensic mistakes writers make. Mistakes you want to avoid.
The Quick Death: Death rarely arrives instantly. Sure, it can occur with heart attacks, strokes, and extremely abnormal heart rhythms, but trauma, such as gunshot wounds and blows to the head, the staples of crime fiction, rarely cause sudden death. Yet, how often has a single shot felled a villain? Bang, and he drops dead. In order for that to occur, the bullet would need to severely damage the brain, the heart, or the cervical (neck) portion of the spinal cord. A shot to the chest or abdomen leads to screaming and moaning and bleeding and expletives, but death comes from bleeding and that takes time. How long? It depends on what’s damaged. If a major artery is opened, the bleeding is brisk and death can follow in five minutes, even less. If the bullet or knife blade only strikes tissues and organs, the bleeding is slower and death can take many minutes, or hours, or not at all.
The Pretty Death: I call this the “Hollywood Death.” Calm, peaceful, and not a hair out of place. Blood? Almost never. Except in slasher movies of course and here massive bleeding is the norm. More often, the deceased is nicely dressed, lying in bed, make-up perfect, and with a slight flutter of the eyelids if you look closely. Real dead people are not pretty. I don’t care what they looked like during life, in death they are pale, waxy, and gray. Their eyes do not flutter, and they do not look relaxed and peaceful. They look dead.
The Bleeding Corpse: Your detective arrives at the scene a half hour after the murder. Blood oozes from the corpse’s mouth, from the stab wound in his chest, or from the vampire fang marks on his neck. Houston, we have a problem. You see, dead folks don’t bleed. When you die, your heart stops, and the blood no longer circulates. Rather, it stagnates and clots and stagnant and clotted blood does not move. It does not drip or gush or ooze or gurgle or flow or trickle from the body. It lies there, separates into a dark red clot with a halo of straw-colored serum, and then dries to a brownish stain.
The Accurate Time of Death: Determining the time of death is neither easy nor very accurate. It’s always a best guess and is always stated as a range rather than an exact time. Yet, how many times have you seen the medical examiner (ME) confidently announce that the victim died at “8:30 last night”? I always wondered exactly how he made this determination. Was it rigor mortis, body temperature, or lividity? Was it the presence or absence of certain bugs? The truth is that none of these is accurate. The decline in body temperature, the appearance of rigor, the development of lividity, and the appearance of flies and bugs are affected by many variables so are mostly unpredictable. The touted guidelines for each of these are like stop signs in Italy--merely suggestions. In real-life, the ME would say that death likely occurred “between 8 p.m. and midnight.” But that might make him appear wishy-washy, and Hollywood and writers like their heroes to be smart. Smarter than they could possibly be. Stick with a range, and you’ll be more realistic.
The One-punch Knockout: You’ve seen this a million times. One character socks another character in the jaw. He goes down like a sack of potatoes and is apparently written out of the story since we never hear from him again. Really? Think about a boxing match. Two guys that are trained to inflict damage and they have trouble knocking each other out. And when they do, the one on his back is up in a couple of minutes, claiming the other guy caught him with a lucky punch. Listen to me. Only James Bond can knock someone out with a single blow, and maybe Mike Tyson, but your car-salesman-turned-amateur-sleuth cannot.
Another common scenario is when a character is hit in the head, placed in the trunk of car, driven 50 miles, tied to a post or a bed or whatever, and then a bucket of water is thrown in his face to revive him. He sputters and is suddenly wake and alert. Not going to happen. If someone is knocked unconscious and doesn’t come around in a few minutes, something very bad is going on. Like a brain bruise (cerebral contusion) or bleeding into or around the brain (subdural hematoma). These require a hospital and a neurosurgeon, not a bucket of water.
The Disappearing Black Eye: If your character suffers a black eye in Chapter 3, she will have it for two weeks, which depending on the time frame of your story just might take you to the end of the book. She will not be “normal” in two days. A black eye is a contusion (bruise) and is caused by blood leaking from tiny blood vessels that are injured by the blow. It takes the body about two weeks to clear all that blood from the tissues. It will darken over two days, fade over four or five, turn greenish, brownish, and a sickly yellow before it disappears. On a good note, by about day seven, she might be able to hide it with make-up.
The Quick Healing: Do you know why boxers wear gloves? To protect their hands and faces. Back in the bare-knuckle days, broken hands and cut and bloody faces were the norm. Gloves made the sport more civilized. So, if your character gets in a fist fight both he and his opponent will suffer cuts and bruises and broken teeth. He will not walk away unscathed. His cuts will need stitches, his bruises ice, and a trip to the dentist is likely. Each of these will take a couple of weeks to heal.
If your character falls down the stairs and injures his back, he will not be able to run from or chase the bad guy or make love to his new lover the next day. Give the guy a few days to heal and make him limp and complain in the interim. If he breaks an arm, he’ll need four weeks minimum.
If he’s stabbed or shot and, as so many protagonists do, sneaks out of the hospital the next day to continue his pursuit of the bad guys, all will not be forgiven. He will have pain that will limit his ability to run and jump and fight and do all those hero things. The chances that his wound could then become infected are real and would greatly complicate his situation and might even kill him.
If his car goes over an embankment and tumbles into a ravine, he will not simply crawl out and walk away. At best he’ll be banged and bruised and at worst will have broken bones and injured internal organs.
The Instant Athlete: Your PI drinks too much, smokes two packs a day, and eats fast food on a regular basis. After all, stake outs are boring. His belly flaps over his belt and he gets short of breath climbing a single flight of stairs. He will not be able to chase the villain for ten blocks. Two on a good day.
If you create a scene where your character must run down a bad guy, make him capable of such a pursuit. Remember “Babe” Levy (Dustin Hoffman) in Marathon Man? He was student, slight of build, not athletic appearing in the least, yet he had to run for his life as Dr. Christian Szell (Sir Laurence Olivier) and his Nazi thugs chased him endlessly. But he was capable. Earlier in the film we learned that he was distance runner and ran around the reservoir in Central Park everyday. He could run for his life.
The Untraceable Poison: Of all the questions I receive from writers this is number one. Seems that all crime writers want an untraceable poison. Sorry, no such thing. True it might not be found or maybe not even searched for, but if it is looked for and if the ME has good blood or tissue samples, he will find it. With fancy equipment like Gas Chromatography-Mass Spectroscopy (GS-MS) virtually any chemical can be identified. This combination gives a “chemical fingerprint” of the compound in question.
The most common drugs involved in overdose deaths are alcohol, narcotics, amphetamines, cocaine, and various tranquilizers and sedatives. The main reason is that these are readily available either on the street or in the medicine cabinet. Each of these is revealed by a simple and cheap drug screen. So, if your killer employs one of these, the ME will know it in a couple of hours.
But what if the toxin is more exotic? Maybe cyanide or thallium or the toxin of a blue-ringed octopus? This is trickier. These don’t show up on routine drug screens and must be tested for with time-consuming and expensive protocols. Maybe the ME doesn’t have the time, interest, or budget to do a full toxicological examination. Maybe he simply attributes the death to some natural cause and saves the county a ton of money. Happens all the time and it can happen in your story. But, if he pulls out all the stops, he will find the drug.
The Instant Lab Result: The world is not like CSI. Not even close. Those CSI folks get results in a New York minute. Sometimes faster. They crack computers, perform autopsies, complete esoteric toxicological testing, and create DNA profiles before the first commercial break. In the real world such testing typically takes days, even weeks. Sure a tox screen can be done in a couple of hours but sophisticated confirmatory testing takes time. DNA profiling can be done in a few hours, but before the ME reports his results he will often obtain confirmation from another lab, particularly in high-profile cases, including those that crime writers dream up. Give your ME a realistic timeframe to do his work. Your readers will notice if you don’t.
The devil is always in the details. Get these details right and your story will be much stronger.
D. P. Lyle
Outliers Writing University: https://www.outlierswritinguniversity.com
But It Really Happened
By DP Lyle
But it really happened. I swear.
This is the defense fiction writers offer when someone says their story isn’t believable. “That could never happen,” they say. But, it could. It did. Still, their disbelief lingers.
I write both fiction and nonfiction. When people inquire about the difference between creating the two, my response is, “They are exactly the same, only different.” With NF, the research comes first. It must be gathered, fact-checked, and organized. Then, the writing begins. With fiction, you must first know your characters, plot, and setting before researching the materials needed to create a story that rings true.
Fiction writers often base their stories on a true crime. A look at best-selling books and iconic movies over the years underlines this fact. The horrific slaughter of the Clutter family in rural Kansas became Truman Capote’s masterpiece In Cold Blood—a book that sits somewhere between fiction and true crime. Serial killer Ed Gein fashioned furniture and clothing from human skin and inspired Hitchcock’s Norman Bates in Psycho and Buffalo Bill in Thomas Harris’s Silence of the Lambs.
For fiction writers, a true crime book, a news story, maybe a blog post sparks the idea. For my third Samantha Cody book, Original Sin, I created a character who was a snake-handling preacher. My research led me to the National Book Award finalist Salvation on Sand Mountain by Dennis Covington. It chronicles the story of Glenn Summerford, pastor of the Church of Jesus with Signs Following, who employed a rattlesnake in the attempted murder of his wife. You bet that little wrinkle appeared in Original Sin.
Or Victor Borkov, the bad guy in my first Jake Longly story, Deep Six. His enemies often found themselves lashed to an iron ring and dropped into the Gulf of Mexico. Alive. This is based on the actions of Skylar Deleon. Look up sociopath. You’ll see his picture. Under the guise of buying their boat, Skylar and a thug friend convinced Jackie and Thomas Hawks to go for a test cruise. It ended with the Hawks bound to an anchor and dumped in the Pacific Ocean. Alive.
These true stories are unbelievable. Yet true. For fiction writers, the trick is to morph unbelievable fact into believable fiction.
We fiction writers owe a great debt to true crime writers. They do the heavy lifting, the research, the telling of the crime, and we use that to inspire and create our stories. Ann Rule once told me that when she approached a true crime story, she looked for the person who was the heart of the story. Not the bad guy, often not the victim, but someone who was deeply affected by the crime. In fiction, we do the same, but have the added freedom of not being bound to the facts.
The marriage between crime fiction and true crime is alive and well.
DP Lyle, Award-winning author, lecturer, story consultant
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