Forensic Friday: Breathless



There are two types of strangulation. One is manual, using the fingers, another body part or an object such as a baton. The other is via ligature, which means using a rope, cord, scarf, really anything that can be used for tying or binding.


Mary Burton Forensic Facts VULNERABLE strangulationStrangulation as cause of death shows itself in many ways, the obvious being bruising and ligature marks, but also manifesting as damage to the larynx, the hyoid bone (between chin and thyroid cartilage) and other neck bones.


Investigators faced with a possible murder will know not to rely solely on ligature impressions to determine strangulation as these telltale marks can be made by similar means after death. They’ll look for additional evidence of asphyxiation and other clues the body can provide as well as circumstantial and, preferably, direct evidence.


Ligature strangulation is often the case in homicides but also occurs in accidents and suicides. One way of differentiating it from death by hanging is that the mark will most likely be lower on the decedant’s neck.  A ligature mark may not be present if a soft material is used, making it more difficult to determine if the death is a crime.


Vulnerable High Res CoverIn this scene from VULNERABLE, Medical Examiner Dr. Miriam Heller walks Detectives Jake Bishop and Rick Morgan through her assessment of the visible marks on the body of victim Elisa Spence.


Dr. Heller moved to the body’s feet and uncovered them. Decomposition had discolored the soles and shrunk the skin around the toes’ cuticles, giving the impression that the nails had grown.


The doctor turned the ankle so that the heel was in plain view. “She has fresh blisters and abrasions. I took a look at her remaining shoe before I sent it to the lab and noted it was older, well worn. I wouldn’t think the shoes would have worn blisters unless she’d been on her feet a long time. There are also scratches on her upper arm that suggest she ran into something abrasive like a tree.”


Jake rested his hands on his belt. “Like someone was chasing her through heavy brush?”


“That would be my guess. Her shoes created the blisters and the branches scratched her face.” Dr. Heller arched a brow.


“One could assume she lost her other shoe while she running.”


“Scent dogs are combing the brush, but so far have not found it,” Rick said.


She moved to the head of the table and uncovered the girl’s face, also darkened and drawn from death. Her lips were pale, bloodless, and more scratches raked across the left side of her face. A purple ligature mark ringed the skin around her neck like a Victorian choker. “The scratches on her cheekbones are also consistent with running through the woods.” She lifted the head and turned it to the right, exposing the flesh under the left ear. “What does that look like to you?”


Jake leaned in to study the blue-purple marks. “Looks like bruises.”


“She’s got matching sets on the other side. The shape is consistent with fingers. Because they’re in slightly different positions, it appears whoever strangled her put hands on her neck several times.”


“Strangled her but didn’t kill her,” Jake said.


“That’s right. I’ve seen bodies marked like this before. They often indicate a choking game.”


Rick pointed to the narrow ribbon of bruises around her neck. “That’s a ligature mark if I’m not mistaken?”


“It is. She died from asphyxiation. The other marks might have been enough to make her pass out but not sufficient to cause death.”


Jake flexed his fingers. “So this started as a game?”


Absently, Dr. Heller laid a hand on the victim’s shoulder. “Smart girls can make stupid choices sometimes. And she might have gone into the woods thinking it was going to be fun when the killer had a different plan all along.”


“Shit,” Jake muttered, thinking about the cave and the candle that had burned through. The killer had not simply dragged her to the cave and killed her, he kept her there for hours and toyed with her. “Any older bruises that might suggest she tried this kind of thing before?”


“No, also no signs of drug abuse. This could have been her first foray into this kind of sexual play.”


“According to her roommate she was smart,” Rick said. “But she did like to party.”


Dr. Heller raised the victim’s right hand and fanned the pale fingers painted in purple chipped at the fingertips. “Debbie found dirt under her nails as if she’d been digging. Maybe she got away and tried to hide. Also embedded in the dirt under her nails, I found skin, so I did scrapings. We’ve processed and sent it off for DNA testing. Looks like she was able to scratch him perhaps a couple of times.”


“Hopefully, she marked him up good,” Rick said.


“Be interesting to know if our killer is in a DNA database.”


“Wouldn’t that be nice.” DNA in a database wasn’t a given. If this guy had never been arrested, it was very possible law enforcement possessed no record of him.


Forensic Friday: The Truth is in the Bruising




When the heart stops pumping the blood goes to the lowest points in the body and creates an unnatural coloring of the skin.  This phenomenon is called lividity.


This discoloration of the skin after death can offer invaluable clues to the investigators.  For instance, if a person dies sitting in a chair or hanging from a noose, the bruising will occur in the dead person’s feet and hands.  Or if the person dies lying down, the patterns will appear on the underside of the victim’s legs, arms and back.  If the person is lying face down when death occurs, the Vulnerable High Res Coverbruising will be found on the front of the body.  If the body’s position at the crime scene does not match these discoloration patterns, investigators have forensic evidence to suggest that the body has been moved.


So if a forensic investigator finds a body face down but the discoloration is on the back, he/she knows the killer altered the original crime scene.


Here’s Georgia at work in VULNERABLE, assessing a victim.



Georgia sat cross-legged as she lifted the victim’s cold and badly swollen hand. Though the cuticles had receded, she could see that in life the victim kept them neatly filed and painted with a faint sheen of purple nail polish that still caught the light.


Carefully, Georgia inspected the fingernails, crusted with dirt, searching for any sign that the victim might have scratched her attacker. Knowing the medical examiner would do scrapings under the fingernails, she covered both hands with paper bags. Porous, the paper allowed air to circulate so that moisture didn’t form and destroy any DNA that might be present.


“Let’s hope you scratched the hell out of him. Maybe together, we can put this asshole away.”


When both hands and feet were bagged, she gently rolled the body on its side. Pushing up the shirt, she noted a purplish discoloration darkening the backside of the girl’s legs and arms.


Called lividity, the color change was caused by blood settling or pooling in the body’s lowest point when the heart stopped pumping. Forensic technicians used stippling patterns to determine if the body had been moved or repositioned.


If there’d been discoloration on the front of the body, she’d have known the girl lay face down for a time before being placed on her back. In this case, it ran the back length of the girl’s body. This suggested the girl was positioned here at the time of death.


Forensic Friday: Lights, Please


“A forensic light source is a crime scene investigator’s and lab technician’s tool for enhancing observation, photography and collection of evidence including latent fingerprints, body fluids, hair and fibers, bruises, bite marks, wound patterns, shoe and foot imprints, gun shot residues, drug traces, questioned documents, bone fragment detection, etc.” *


Mary Burton VULNERABLE image hi res

As noted in the description above from Horiba Scientific, the right tools—in this case proper or specialized lighting—for examining potential evidence is invaluable. That coupled with thorough and painstaking attention to detail Georgia-style can make all the difference in finding and convicting a felon. In this excerpt from VULNERABLE she uses white light while combing for evidence and black light to identify blood stains.


Pushing him from her thoughts, she focused on the white striped button-down shirt, taking extra care to tug any wrinkles on the arms or front panel. She clicked on a light suspended from a retractable arm and shone it on the material. She would go over the shirt, combing the fibers and threads for any loose materials that could be tested for DNA.


Killers always thought they were clever, but like she had said before, they all left something behind for her to find. It might be barely noticeable, but it was there.


She moved up and down the shirt, plucking several dark hairs with tweezers and then bagging and tagging them. She collected blood samples from the torn right sleeve and from the collar of the shirt. Once she reviewed every inch of the shirt a second time, she turned off the white light and grabbed a black light. Clicking it on, she scanned the shirt, searching for stains, including blood, semen, or urine. As she raised the bottom hem of the shirt, she spotted a faint stain glowing under the black light.


“Hey, now,” she muttered. “Where did you come from?” She carefully clipped away part of the fabric and dropped it in a test tube. “Thought you were so clever, didn’t you.”


“Did you say something?” Brad asked.


“Found a stain.”


He raised his head. “Good.”


Georgia scraped dirt from the bottom of Elisa’s shoe, plucked hair fibers from her skirt and documented two more stains.


She studied the shoe Elisa had worn into the woods. It was simple but expensive. Checking the label on her skirt and shirt, Georgia noted the moderately priced labels.


“The bodies in the back chamber look like a murder suicide,” Brad said.


“I’d have bought it, if not for the newest victim. No way a second killer would have found that cave. No way.”


Likely little forensic data remained on the bones, but it only took a little to connect killer to victim.


*Horiba Scientific (


Forensic Facts—“VCU Edition” Dye-ing for Evidence



Forensic Friday VCU edition concludes with this share of another Forensic Fact garnered during VCU log 2Sisters in Crime Central Virginia‘s March 22nd visit with Dr. Marilyn Miller of the university’s  Department of Forensic Science.


Mary Burton Forensic Facts VCU protein stains #3 cropped flipped


Amido black dye is a sensitive protein stain that is suitable for collecting latent prints on blood stained surfaces.   Whereas another agent may rinse away (on tile) or destroy (on paper) the bloody finger print, Amido black dye bonds to the proteins left behind by a finger and then affixes it to its surface. 


Mary Burton Forensic Facts VCU protein stains #1







A quick, strong contrasting process, the stain will color the protein a blue-black color.  And as you can see, we found protein left behind by a finger writing ‘hi’ on a piece of paper. Though we developed our proteins in solution baths, Amido black dye can also be put in a spray bottle for use at crime scenes.









VULNERABLE—A Publication Day Excerpt!

Mary Burton VULNERABLE image hi res


An Excerpt from Mary Burton’s New Morgan Family Novel, VULNERABLE


“I should be more careful when I ask for extra work.” She scooped up a handful of nuts from a bowl on the bar and popped them in her mouth. “It’s taken me weeks to read through the files.”


“Deke tells me Dalton Marlowe is putting the squeeze on everyone.”


Dalton Marlowe was a very rich man whose son was one of three teens who went into Percy Warner Park five years ago. The students, from an exclusive high school called St. Vincent, went hiking in the southwest Nashville park that covered twenty-six hundred acres of wooded land crisscrossed by a dozen backroad trails, bike paths, and dead end roads. Their plan was to collect data for a science project and return home by dark.


When the teens had not reported in that night, search crews had been dispatched. At the end of the second day, volunteers found one of the kids, Amber Ryder, at the bottom of a ravine. Her arm was badly broken and she suffered a head injury. When she woke up in the hospital the next day, she swore she had no memory of what had happened in the woods. Search crews continued to look for weeks but the two other students, Bethany Reed and Mike Marlowe, were never found.


Mr. Marlowe has been pressing the Missing Persons Unit relentlessly for answers. This year, he again made a sizable donation to the police foundation, a kind of gesture that expects a return. Marlowe was clear that he didn’t want to hear any more bullshit theories about his son Mike and Bethany running off like a modern-day Romeo and Juliet.


“So Deke’s balls are in a vise with the mayor?”


She shrugged. “He’s getting a hell of a lot of pressure from City Hall, but it doesn’t look like it’s fazed him. He hopes to kill two birds with one stone. Give me a cold case that I’ve been clamoring for and pacify the powers that be. It’s a win all the way around.”


“I was still on the job then. But because the case was considered a missing persons investigation, I never got a crack at it.  I think they pulled Buddy in once.”


“Well, it’s now being investigated as a homicide.”


“Too bad your old man and I didn’t get a real crack at it.”


“I wish you had.  So far, I’ve got eighty hours invested in reading witness statements, search crew reports, interviews, and examining the forensic data.”


Dark eyes sharpened as they did when he’d been on a homicide investigation. “What about that kid that survived?”


“Amber Ryder. I tracked down her number through her mother, Tracy. The woman wasn’t thrilled to see me or talk but she gave me a phone number. I’ve called it a couple of times but so far no return calls.”


A tall waitress with dark brown hair signaled KC she had an order. He filled three steins with beer and set them in front of her. As he moved back toward Georgia, he faced the register and punched in the order. “You working the case alone?”


Georgia swirled her drink in the cup. “No, as luck would have it, Deke has assigned Jake Bishop to the case with me.”


“He’s a solid cop.”




He shook his head, understanding that stubborn ran as deep in Georgia as it did in her brothers and her late father. “So, what now? You don’t want to share?”


“Not that. Jake irritates me.”


Amusement tweaked the edges of his lips. “How so?”


She leaned forward. “Started flirting with me in the last year. Hell, I stayed off his radar just fine and then suddenly I’m right in the middle after he caught one of my shows here.”


“That so bad?”


She held up a finger as if reading her lists of cons. “He’s a cop and I’ve always made it a policy not to date cops.”


“My late wife never had any issues with being married to a cop.”


“Well, Deb was a saint and we both know I’m not. I watched Mom do it with Dad and I don’t want any part of that.”


He pulled a bar rag from his shoulder and wiped up the few peanut shells she’d dropped. “I don’t think he’s looking to put a ring on your finger.”


“No, he’s looking for a roll in the hay and I don’t need a quickie with a guy that will forget me before his pants are zipped.”


KC’s laughter rumbled. “Jesus, Georgia, ever thought that you might not be so easy to live with.”


She held up her hands in surrender. “No arguments here, KC. Not a one. Which is why I don’t need any more cops in my life.”


“You got him wrong, kid.”


She took a long sip of soda. When she was down to ice, she crunched a few pieces between her teeth. “Don’t care. My focus is the case and the case alone.”


“Have you found anything the old teams missed?”


“Nothing so far. They didn’t leave a stone unturned. And none of those guys gets any criticism from me. Hard to solve a case when you don’t have bodies, no suspects, and a witness with no memory.”


“You really think you can crack the case after all this time?”


She shrugged. “It’s only been five years. Maybe someone knows something and will talk. Maybe Amber Ryder will call me back and tell me she’s remembered something.”


Skepticism deepened the lines of his face. “Amber always said she never could recall a single detail about what happened in the woods.”


She fished through the nuts in the bowl searching for a cashew. “Her testimony was consistent throughout the police files.”


“She was a suspect, but her unwavering testimony won over a lot of cops.”


She tipped her glass up, drinking until she drained the last bit of liquid. “Could be as simple as she was telling the truth.”


“Could be.”


Carrie, a tall, thin waitress, wore a tight red Rudy’s T-shirt and figure-hugging jeans, placed a drink order with KC. “Georgia, long time no see.”


“Looking good, Carrie. How’s the baby?”


“Fat and happy. Two months old now.”


“Time goes fast.” Georgia noticed the dark blue bruise ringing Carrie’s forearm. Last she heard from KC, Carrie had broken up with the boyfriend that liked to pepper her with bruises. “You still seeing Hal?”


Carrie turned so the bruise was no longer visible. “Yeah. He loves the baby.”


“So much he puts bruises on her mother.”


Carrie’s skin pinked with embarrassment. “It’s not like that. Got this from an accident.”


How many times had Georgia had this conversation with Carrie? Too tired to argue, Georgia grabbed a napkin and a pen from behind the bar and scrawled her name and cell phone number on it. “When you and the baby are ready to leave, call me. You can stay at my place.”


Carrie shook her head, her eyes wide with panic. “It’s not like that. Hal loves me.”


“Put the napkin in your pocket. One day you might decide that love doesn’t have to hurt like that.”


Carrie crushed the napkin, but she tucked it in her jeans pocket before arranging the beers on her tray.


Nodding, Georgia flattened her palms on the bar, wanting to scream at the woman but unwilling to repeat what she had said a dozen times before.


A frowning KC filled the order. “Go on and get those served.”


“Sure thing, KC.” She offered them both an apologetic smile before she hurried away.


“Damn it,” Georgia muttered.



©Mary Burton 2016