Category Archives: Corpse Location

Crime and Science Radio: When Disaster Hits: Naming The Dead: An Interview With NTSB’s Paul Sledzik

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How does forensic science help us in the aftermath of disasters such as plane crashes, floods, hurricanes and other events that result in mass fatalities?  We find some answers in this episode, when D.P. Lyle and Jan Burke interview Paul Sledzik.

In this episode, he tells us about historical responses to mass disasters, such as the General Slocum disaster of 1904, which caused the loss of over one thousand lives.  He’ll also talk to us about today’s processes for dealing with mass fatality events, the role of forensic scientists in processing mass fatality incidents, and the work done on these sites by forensic anthropologists and other specialists.

Near the end of the interview, we were also able to talk to him a little bit about his work on historical remains belonging to “New England Vampires.”

Bio: Trained as a forensic anthropologist, Paul Sledzik began his career at the National Museum of Health and Medicine in Washington, DC, as a museum technician. By the time he departed the museum in 2004, he had become a curator with responsibilities over the museum’s unique and historic anatomical and pathological collections. From 1998 to 2004, he served as the team commander for the Region 3 Disaster Mortuary Operational Response Team, a division of the US Department of Health and Human Services. In the response to the events of September 11, 2001, he led the DMORT team in the identification of the victims from the crash of United flight 93 in Shanksville, Pennsylvania.

Paul joined the National Transportation Safety Board’s Transportation Disaster Assistance Division in 2004 as a medicolegal specialist and in 2010 became the division director. The division coordinates access to information and services to support victim and family members impacted by aviation accidents and accidents in other transportation modes.

He has served as a consultant and advisor to federal and non-governmental agencies on issues of human identification and disaster response. A Fellow of the American Academy of Forensic Sciences, his scientific articles have appeared in professional journals and textbooks. He has participated in the response to over 30 mass fatality events and transportation accidents.



National Transportation Safety Board

NTSB: Information for Families, Friends, and Survivors

NTSD: Family Assistance Operations: Planning and Policy

The National Museum of Health and Medicine

Federal Emergency Management Agency

U.S. Department of Health & Human Services Public Health Emergency/DMORTs:

New story on study of preservation of DNA in mass disasters

The General Slocum Disaster, New York, June 15 1904 — over 1000 lives lost

General Slocum Disaster information at New York Public Library

“Sinking of the General Slocum” information at The Mariners Museum

General Slocum Disaster information at New York History.Info

Triangle Shirtwaist Factory Fire, New York, March 25, 1911 — over 140 lives lost

Documentary on YouTube 

History Channel site

Centennial program on NPR’s “All Things Considered” 

The Eastland Disaster, Chicago, July 24, 1915 — over 800 lives lost, including all members of 22 families

Eastland Disaster Historical Society description of the disaster

Montage of newspaper photographs of the event on YouTube

Eastland Disaster documentary on YouTube

“Brief communication: bioarcheological and biocultural evidence for the New England vampire folk belief.” (American Journal of Physical Anthropology)

The Great New England Vampire Panic



Crime & Science Radio: The Body Tells the Tale: DP Lyle and Jan Burke Interview Dr. Bill Bass and Jon Jefferson

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The Body Tells the Tale: DP Lyle and Jan Burke Interview Dr. Bill Bass and Jon Jefferson

Join DP Lyle and Jan Burke as they explore the world of death, corpses, and decay with Dr. Bill Bass and Jon Jefferson. Dr. Bass is the founder of the University of Tennessee Anthropological Research Facility, the so called Body Farm. Jon Jefferson is a journalist, writer, and documentary film maker. Together they write fiction as Jefferson Bass. This will be a lively, or is it deadly, interview.



The Body Farm-Wikipedia:

Tour The Body Farm:

Video Tour of The Body Farm:

WBIR Interview:

JeffersonBass Website:

Death’s Acre: Inside the Legendary Forensic Lab the Body Farm Where the Dead Do Tell Tales:

Metro Pulse: The Cult of Forensics Expert Dr. Bill Bass:

Peter Breslow’s 2004 NPR Profile of The Body Farm:



Crime and Science Radio: Jan Burke Interviews Cat Warren, Saturday at 10 a.m. PST

Listen in at 10 a.m. PST this Saturday or catch it later in the archives.

What the Dog Knows: The Science and Wonder of Working Dogs: An Interview with Cat Warren

Cadaver dog handler Cat Warren is the author of What the Dog Knows: The Science and Wonder of Working Dogs, a terrific book on dogs who work in the military, in police departments, and by searching for both contemporary and historical missing remains.  She talks with Jan Burke about how cadaver dogs and their handlers are trained, the environments and conditions they work in, and what we do and don’t yet know about how dogs find the missing dead.


Cat Warren:

What do we know about dogs noses?:

Cadaver Dog (Andy Rebmann and Marcia Koenig’s site):

National Search Dog Alliance:

The National Missing and Unidentified Persons System (NamUS):

FBI Statistics for Missing and Unidentified Persons in the US for 2012:


What the Dog Knows by Cat Warren

The Cadaver Dog Handbook, by Andrew Rebmann, Edward David, Marcella Sorg

Analysis of Lost Person Behavior by William Syrotuck and Jean Anne Syrotuck

Canine Ergonomics: The Science of Working Dogs by William S. Helton



Hyperspectral Imaging and Corpse Location

One of the most difficult things criminal investigators can face is locating a corpse that has been dumped in a remote location. Large number of searchers will fan out in any area where the body might be and spend many hours and days searching, often without result. Cadaver dogs can help in that they can detect the odor of decomposition, even in buried corpses. Arial infrared scanning can also be useful since a decomposing corpse tends to produce heat, which the scanner can detect against the cooler background of the surrounding soil. Also, aerial photography can help by indicating areas where the natural vegetation has changed in some way.

A decomposing corpse can initially produce a toxic environment for plant growth and can therefore make the vegetation less lush in that area. As the decomposition process progresses however it often serves as fertilizer and enriches plant growth so that they are greener, more lush, and appear different than the surrounding growth. Aerial photography can often detect this.

A new technique has been developed by scientists at McGill University. It is called Hyperspectral Imaging. It is similar to aerial photography but more sensitive. It also can be useful over a longer period of time.

Initially the chemicals of decay released by the body can inhibit plant growth and alter the way light is absorbed or reflected by the plants near the burial site. Early on they don’t reflect visible and infrared light as well but after several years they tend to reflect light much more readily. This new hyperspectral imaging system can detect these differences and therefore locate the burial site. Burial sites as old as 50 years have been detected using this technique. Exciting stuff and it will be interesting to see how this develops.

For more on locating and then identifying corpses check out my book Howdunnit: Forensics.


Hand-Held Sniffer and Body Location

So you’re bad guy has buried his victim somewhere on his vast farm. Your sleuth knows this but can’t prove it. Locating the corpse is critical to making the case. Search teams and cadaver dogs are brought in but the days drag by with no results.

Electronic noses were developed for this very circumstance. These devices are basically gas chromatographs. They sample air near the grave where the molecules of decomposition percolate up from the decaying corpse. Thomas Bruno, a physicist at the National Institute of Standards and Technology (NIST) recently reported in New Scientist the development of a handheld sniffer device, which should allow investigators to more quickly cover large areas, allowing for more timely corpse location.

I earlier posted a note about microfluidics. This device incorporates some of that technology. The device contains a very thin capillary tube whose inner surface is coated with aluminum oxide. Air is then sucked into the tube. If this air contains any of the various amines produced by decomposition, these molecules will combine with the aluminum oxide. This new amine-aluminum oxide combination can be detected using UV light.

This device is still in the developmental stage but could prove to be a very useful tool for corpse location.


Diatoms on Clothing and Corpse Location

Drowning is one of the most difficult causes of death for the medical examiner to determine. You would think he would simply have to find the lungs filled with water to make this call but that’s not the case. If a corpse is tossed into a body of water, the lungs will passively fill with water as the air escapes and is replaced with the liquid. So the simple finding of water-filled lungs does not prove the cause of death was drowning.

But the medical examiner has a couple of tricks that can sometimes help. Though not always present, if he finds debris within the mouth and lungs as well as damage to the nasopharynx and the airways, both of which result from the victim struggling for air but only breathing in water, these findings would suggest that the victim was alive when he entered the water. Debris deep within the lungs can’t get there passively and must be inhaled.

And in some cases, diatoms can help.

Diatoms are microscopic organisms that live in all types of water. They can be found in oceans, lakes, and your own bathtub or swimming pool. These tiny creatures are protected by a silicon–containing shell that is quite resistant to damage. They survive in a corpse for a long time. Though controversial, they can be used for determining if someone drowned. In this circumstance, as water is inhaled in the lungs, these diatoms worked their way from the air sacs of the lungs into the bloodstream and from there escape into the tissues, particularly the bone marrow. The medical examiner can test the bone marrow of a suspected drowning victim and if he sees a large number of diatoms then he might conclude that the victim died of drowning.

Now it seems that diatoms might also help locate where a crime took place in cases where the corpse has been moved and the victim’s clothing contacted water. A recent study in the journal Forensic Science International suggests that diatoms can be found in the victim’s clothing. Cotton clothing that has contacted water will absorb and retain the diatoms from that water. If these can be located and identified then they can often be traced back to the source. Diatoms vary from location to location so comparing those found on the victim’s clothing with those of a certain location might be useful in placing the body at that location.

This can be very useful to investigators when a person has been killed near a body of water and then their corpse is dumped at another location. Locating the primary crime scene–the place where the murder took place–is extremely important to investigators since this often results in finding further evidence that leads to the perpetrator. If these diatoms can help make that connection, they might prove to be a useful investigative tool.


On This Day: King Tut Found

On this date in 1922, Howard Carter discovered the entrance to the tomb of the boy king Tutanhhamun, an historical figure that has been the subject of many investigations, several movies, many works of both fiction and nonfiction, and a parody by comedian Steve Martin. His place in world history is well-established.

Tut's Mask


He was born around 1341 BC and ascended to the position of Egyptian pharaoh of the 18th dynasty in about 1333 BC at the ripe old age of nine. He held that position until his death a decade later. One of the mysteries surrounding King Tut is his parentage. His father might have been Amenhotep III or maybe Akhenaten or maybe someone else.  His mother is equally controversial with some believing that she was Queen Tiye and others that she was Queen Kiya. This controversy continues and we may never know the truth.

There is also a great deal of speculation about what caused his death at such an early age. Everything from accidents, to medical problems, to murder have been postulated. In the search for these answers his body has been x-rayed several times and a CT scan has been performed at least once.

Tuts CT


One of the x-rays showed a dense calcification at the posterior base of the skull and many postulated that this could be from a traumatic hematoma. The problem is that calcification (the addition of calcium to a scar, more or less turning it to bone) takes many months if not years. This would mean that he would have had to survive quite some time after the injury if indeed a blow to the back of the head caused this calcified area. In view of that, it is unlikely that a blow to the head in this region is what caused his death. Yes, some subdural hematomas that follow blunt trauma to the head can initially be small and nonlethal for many months and then can expand and cause death. But this would require the presence of a very large hematoma or a large amount of bleeding into or around the brain and apparently none of this was found in any of the examinations of the young man’s body. I think a blow to the head is very unlikely to have caused his death.

Tuts Skull

When discovered, his left femur (thigh bone) was fractured. Though this is a serious injury and can indeed lead to death from bleeding or from later infection or even from blood clots that form in the leg, break loose, and travel to the lungs as pulmonary emboli, many believe that the fracture of the femur occurred during the embalming process and was not a pre-mortem event. Again, it is unlikely that this was the cause of his death.

Others have suggested that he was poisoned, drowned, strangled, or that some other method of murder was used. There is no evidence to support any of these theories but they are interesting.

As far as a natural event causing his death, this is entirely possible but again there is no way of knowing. He was a very unusual looking young man. He had very large front teeth with a massive overbite and an elongated head, both of which were characteristics of his ancestors. He also apparently had a cleft palette and some degree of scoliosis. All of these findings could point to some musculoskeletal or connective tissue disorder such as Marfan’s syndrome. Marfan’s is a connective tissue problem where there is weakness of certain tissues. The joints tend to be loose, the palette tends to be high and arched, the lenses of the eyes can be displaced leading to visual difficulty, and the aorta can be weak and expand into an aneurysm that can rupture and prove deadly. Could this have happened to the young King Tut? Since the CT scan showed no evidence of an aortic aneurysm this is very unlikely if not impossible.

And so the mystery remains.

The Death of King Tut

Tutankhamun-Cause of Death

Mummification is one of the three main ways a body will change after death. The most common is decay, or putrefaction. This is a process mediated by bacteria and these bacteria prefer warm and moist environments. Most of the bacteria that cause decay of a corpse come from within the body, specifically the G.I. tract.

Under certain circumstances a body may undergo adipocere formation. Here the body takes on a waxy and mannequin like appearance. This is caused by certain acids and alkalis in the environment reacting with the body fats in a process similar to soap making. Once this process is complete, the body will appear like a pale white or grayish waxy doll.

For a body to undergo mummification, moisture must leave the body fairly quickly and leave behind an environment that is not friendly to bacteria. This can happen with a body dumped in a hot dry desert or one that is left on the hillside at a very high elevation where the air tends to be more moisture-free are even in bodies that are dumped into cool dry basements or closed up in the building crawl spaces. The bottom line is that a dry environment is essential for mummification.

The Egyptians were masters of the mummification process and Egypt’s hot and dry climate made their job much easier. Mummification follows from their basic religious beliefs in an afterlife where the person would need his body on the other side. By mummifying the body, it is protected, hopefully for all time. Since we have found mummies that are thousands of years old and are still incredibly well preserved, they seem to have accomplished their goal. But how did they go about doing it?

The process really addressed three goals: removal of the internal organs, dehydration of the body, and preservation of the tissues. The removal of the internal organs was essential to prevent decay since corpse decay begins inside the body. The ancient Egyptians did not have the knowledge of exactly what the decay process was or that it was mediated by bacteria or that these bacteria needed warmth and water, but rather they made the empiric observation that the internal organs decayed readily and their removal would slow or halt this process. They tended to remove all of the intra-abdominal organs, and were quite elegant at removing the brain through the nose or through small holes drilled of the skull, but they almost invariably left the heart behind. The lungs would be taken, but not the heart, indicating that it held great importance to them. The removed organs would be preserved by wrapping them in oil or resin soaked lenin and placed in ornamental jars around the tomb. I imagine this was done so that when the individual awakened on the other side he could simply reinsert his organs and carry on.

The next issue was to dry out the body. This removal of moisture from the tissues prevented bacterial growth and decay. They used various salts and oils and other solutions to accomplish this. Things such as myrrh, salt, natron (a combination of various sodium-containing compounds), mineral spirits such as turpentine, and other dehydrating herbs were used. Linens, soaked in resins, cedar and other oils, and other chemicals, were stuffed into the body cavities. These helped dehydrate the body and likely had some antibacterial effects.

The bodies were typically wrapped in linen soaked with oils and resins and sometimes beeswax or plaster was placed over the outside to serve as a final protective coating.

I imagine each mummy maker at his favorite technique and chemicals.

Making an Ancient Egyptian Mummy

Mummification in Egypt: An Overview



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