law enforcement

FW: “Can’t get rid of the blood?”

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Continuing the series of articles about Evidence Collection Training Classes held at SIRCHIE.

Click here for Part 1 – “Have you been fingerprinted?”

Click here for Part 2 – “Where are the Evidence Collection kits made?”

 

Part 3 – “Can’t get rid of the blood?”

The morning of Day #3 of Evidence Collection Training classes at the Sirchie Fingerprint Laboratories in Youngsville, NC was spent on the tour of the company’s manufacturing facility. We watched as fiberglass fingerprint brushes were made from start to finish, saw riot helmets being assembled, heard the printing presses rhythmically slap logos and directions onto stacks of waiting cardboard, saw employees counting and rechecking boxes of supplies and chemicals. We witnessed a smoothly running facility. That’s what it takes to insure that the products the law enforcement community uses to catch and prosecute the criminals work. Every time, without fail.

After the tour, Robert Skiff (Training Manager/Technical Training Specialist at Sirchie) told us about a new method of fingerprint enhancement developed in Scotland. A bullet can be placed in the middle of an apparatus that shoots electric current into the cartridge and reveals the moisture from a print. This method was demonstrated on an episode of Rizzoli & Isles. Kudos to the show’s writers for including this fascinating technology!

Another interesting piece of equipment is the ElectroStatic Dust Print Lifter. Impressions left at a crime scene in the dust on the floor, or on dusty doors or walls, can now be lifted and preserved. A shot of electricity is applied to foil cellophane and any dust below/behind the lifting mat will stick to it. If there is a palm print or fingerprint, it will show up as a mirror image of the original. Rough floors or brick surfaces where a suspect may have jumped, can now be processed using this lifting method.

 

Our afternoon training segment dealt with blood and other bodily fluids.

Bloody crime scenes are horrific, but law enforcement officers have to put their feelings aside in order to process and maintain the chain of evidence. Everything they do is aimed at furthering a case to convict, so the scene needs to be secured in order to keep people or animals from contaminating the evidence. If blood is visible at the scene, photographs are taken before the collection process disturbs anything. The photos assist in showing the overall patterns and placement of the drops and splatters. Investigators can determine the approximate place in the room where the victim was first struck, whether the victim was dragged or bludgeoned or shot, if there were one or several victims involved, the velocity of the strike, whether there are arterial spurts, etc.

 

Examples of blood spatter patterns

 

In order to accurately demonstrate and then analyze the scope and nature of the spatters, the area covered with visible blood is measured and scaled (paper rulers are applied next to the surface being photographed).

 

Blood spatter tagging and scaling

Then it is tagged with information that will help the investigators figure out the sequence of events during the commission of the crime.

Blood Spatter Trail

Specific characteristics of the droplets – whether there is a tail or shaped like an ellipse or a circle, whether small or large circular drops – all reveal information to the investigators and examiners. TV and movie watchers often hear the phrase ‘blunt force trauma’ as a cause of death. This most likely means that the victim has been struck with a baseball bat or a bottle, or a golf club (my fave fictional instrument of death) with medium velocity, so the droplets will be medium sized. (See the drop several inches in front of Mr. Skiff’s finger)

A high velocity hit (from a bullet) will have smaller droplets because the blood is broken into smaller pieces as it leaves the body and is sprayed onto the walls or floors.

Weapons that are close to the scene or involved in the crime, may get blood on them. They need to be processed for blood as well as prints.

 

Blocking out area of floor of interest to investigator

After the visual scans of the room for the visible blood, and the initial photography has been completed, then the areas of possible bloodstains can be swabbed, the samples bagged and identified (as to placement in the room). Presumptive tests can be conducted at the scene, using the Field Kits that contain chemicals commonly used for this purpose. Presumptive tests can help eliminate stains that are not blood, but the stains cannot positively be identified as blood until taken to the lab for confirmation – a detail that TV crime shows frequently fudge.

An added level of security for preserving a sample is to make transfers from the original or take chips of the original, but not test the original. That insures that additional tests can be conducted at a later time on the original or pieces of it.

 

Unknown Stain

Three transfers were made from an Unknown Stain and then tested with various chemicals.

 

Latent Bloodstain Reagent Products

 

Unknown stain luminesces

The third transfer was sprayed with a bloodstain reagent, and then the lights were turned off. The Unknown Stain luminesced, therefore indicating the presence of heme, a portion of hemoglobin.

If there is no visible blood in the room, but a crime has been reported as having been committed at that site, it is common practice for investigators to work in teams to process the room. The room is darkened, one investigator sprays the walls with a blood search product, while the other marks (tags) the spots that luminesce. The lights are turned on and then the room is photographed, then processed/tested. The method of spraying and tagging is repeated for floors as well.

It’s worthwhile to note that blood cannot be destroyed with paint. No matter how many coats, no matter what color paint is covering the evidence of the deed, the tests will always reveal that blood has been spattered beneath it. It gets into every crack and crevice. And it just can’t be washed away. Remember the ‘trace evidence rule’? A crook always leaves something behind.

For all you crime show TV junkies out there (I’m one of them): that red blood you see on the bed or wall or floor (hours after a murder has been committed on the show) is strictly for visceral effect. Human blood turns brown or almost black as it dries.

 

Sexual Assault Collection Kit Record

Unfortunately, reports of sexual assault crimes are on the rise. But, ‘He said, she said,’ cases are difficult to prosecute because there are rarely any witnesses to the crimes. Samples taken from the victims need to be pristine and chain of custody must be clearly established. Clothing and bodily fluids need to be collected from the victim as soon as possible after the crime in order to have a chance of catching and prosecuting the perpetrator. A good practice for evidence collection from victims who arrive at the hospital is to have them disrobe while standing in the middle of a sheet. Then the sheet corners can be pulled together, keeping as much evidence as possible intact. Rape victims may not wish to be touched, but swabbing their bodies for fluids, then bagging and testing whatever is collected, may be the only way to tie a suspect to the rape.

 

 

Seminal Fluid Test

A presumptive test can provide important information to include (or exclude) a possible suspect from consideration. There will be an instant (up to 3 seconds) reaction if the unknown substance at the scene or on the victim’s body contains seminal fluid. If the results take longer than that to appear, it must be reported that a false-positive has been found. This might happen if there is not enough of a sample or if the transfer made from the original sample was not good enough.

Rape and homicide evidence is kept for years. Bagged, tagged, stored. Photographed and entered in databases as well. If the suspects aren’t caught right away, then the evidence is still there, waiting in storage, to be matched to other evidence that pops up in later crimes.

 

 

*Photos taken by Patti Phillips at SIRCHIE Education Training Center in Youngsville, NC.

 

 

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KN, p. 115 “What does a Sheriff do?”

 

The only interaction most people ever have with a Sheriff is if they’re watching the old “Andy Griffiths Show” on TV or are checking out a Western that features a Sheriff who has come to town to save the day. TV/Movie portrayals aside, what does a Sheriff actually do? And how do his duties differ from those of a Police Chief? Are their jobs interchangeable?

I had a chance to sit in on a training class with a Sheriff, and the differences are important.

The Sheriff

  • He/she is usually an elected official and is the highest ranking member of the department. 
  • Sheriffs generally appoint their own deputies and can appoint civilians to be deputies on the spot as needed. 
  • He/she can enforce the law, maintains the county correctional facility, and is sometimes the only law enforcement officer in the county. 
  • He/she transports witnesses and prisoners for county courts. 
  • Sheriffs can serve as tax collectors and therefore, can seize and sell property when taxes are in arrears. 
  • He/she serves subpoenas and civil papers (like divorce decrees or eviction notices, etc.) 
  • He/she decides on and maintains an operating budget. 
  • Every county has a Sheriff, but a Police Department is optional if the county has little crime within its boundaries. 
  • Sheriffs have concurrent jurisdiction within each village, town or city within the county. 


The Police Chief

  • A Police Chief is almost always appointed, and has no hiring/firing powers.
  • Most Chiefs are selected by the mayor and approved by the city council, but some are hired by a City Manager and some are elected.
  • A Police Chief has authority only over criminal matters and does not serve papers for civilian cases.
  • A Police Chief can make recommendations for the annual departmental budget, but does not collect taxes or have control over the actual amount of the budget.
  • The Police Chief’s authority is restricted to their own town and they are legally civilians outside their town.

 

In some states, some towns are very small, have little or no crime, and have no real need for a full Police Department. Detectives have nothing to do, so the department might be disbanded for economic reasons. In that case, the Sheriff’s Department would handle whatever crime might occasionally occur.

Candidates have been known to switch from the Sheriff’s Department over to the Police Department, but have to go through the new department’s training program.

State Police have jurisdiction throughout the state.

A Sheriff’s Department has jurisdiction throughout the county.

A Police Department has jurisdiction only within the town lines (unless in active pursuit of a suspect).

If there is a fatal car crash on a state highway, the Highway Patrol handles it, but if there is a felony stop or shooting, then the county (and therefore Sheriff’s Department) handles it.

 

Other notes:

There are over 3,000 Sheriffs in the USA.

There are three states that don’t have Sheriff’s Departments: Alaska, which has no county governments; Connecticut, where Sheriffs have been replaced by Marshals; Hawaii, where Deputy Sheriffs work for the Department of Public Safety.

I did a ride-along with a Deputy Sheriff out in a remote county one hot summer evening. While we rode on the highway, he explained what he looked for in suspicious behavior of other drivers on the road, showed me how his on-board computer worked while he drove at 65 mph on the highway, kept in touch with Dispatch about a developing hostage situation in the county, and ended the night with an investigation of a possible burglary. He felt that his cases had the same variety as a Police Officer’s and he liked the wider jurisdiction of the Sheriff’s Department.

Spend a similar evening in a Police Officer’s car and while your tour might not take you as many miles, I would bet you might have the same experience – a proud officer explaining a job he loves.

 

 

 

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KN, p. 216 “Crime Scene at the Beach”

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A recent vacation week took us to the beach and we were lucky enough to rent a cottage right on the ocean. What a pleasure to wake up to seagulls calling to each other as they found breakfast on the incoming surf at the edge of the broad expanse of sand. Morning coffee was extra special as we breathed in the sea air and planned the day ahead.

 

Aside from all the great sunsets, fabulous seafood restaurants, and much-needed relaxation, we found time to chat about fictional bodies and where to find them.

 

TV shows and movies feature their share of corpses that have washed up on the rocks lining the shores of lakes, bays, or oceans. Any crime scene at water’s edge has its own challenges for the CSI techs processing the area for evidence, and our vacation spot highlighted a few.

 

Consider footprints on the sand:

 

 

 

 


This print had been fully visible until a wave washed it partially into oblivion.

 


Sneaker treads next to the barefoot print, showed the traffic on the dry part of the beach just a few feet closer to the dune.

 

 

 

 

There was more than one kind of sneaker tread to be seen.

 

The sneaker and shoe companies have data bases going back several years indicating the treads and styles of the various shoes they have manufactured. A search warrant or a friendly conversation with the people at the companies will reveal specialty editions of their footwear and the year they were produced. Matching the footwear to the prints on the beach can narrow the suspect list – helpful if the culprit remained in the area and the sneaker was an unusual brand.

 

Consider the tire tracks:

 

 

A windy afternoon caused this tire tread to lose its definition.

 

 

 

 

 

 

 

This new tire tread was just ten feet away from the footprints.

 

 

 

 

 

 

 

 

 

Beach bikes were in use as well. I didn’t have a ruler with me, so Sheila donated her sandal. This gives you some perspective of the width of the tread, essential in determining the type of vehicles near the ‘scene of the crime.’

Tire companies have data bases as well, and make their information available to law enforcement officers when needed. CSI techs take photos of the various treads for later ID and if needed, make casts of the footwear prints. Read “Is that your footprint?” here.

All three vehicle treads were within 20 feet of each other, along with all the footwear prints seen here – and it wasn’t high season yet, when a greater variety of cars, dune buggies, bikes, and shoes would be around.

 

Any crime scene in such a well-traveled place means it will be tough to find the killer. Nature washes or blows away the evidence and the crime scene is compromised by all the foot and vehicle traffic.  

Law enforcement officers have to hope for witnesses to the dastardly deed.

 

We turned our attention to the places to hide the body:

 

 

 

This lovely walkway leading from the cottage to the dunes gave access to an area that looked suitable for body stashing. Except that it wasn’t really all that great for anything covert. Three houses near ours had direct line of sight to that walkway, and all had overhead lights strung along their own paths to the beach.

 

Each of the other houses had three floors – ours was the smallest of the group.  That meant that anyone looking out at the ocean could also see anyone dragging a body out to the beach grass next to/under the boards.

 

 

 

 

 

 

But, let’s say that nobody is looking out the window. While it is illegal to dig up the beach grass in the dunes because of erosion programs in most oceanside communities, a killer would have no such concerns. BUT, that Beach Grass (actual name is American Beach Grass) is tough. It’s meant to be, so that it holds the sand in place during stormy weather. It would not be practical or at all speedy to dig a hole in a grass-covered dune in order to hide the body.

 

Maybe that’s why so many bodies in the TV movies are dumped elsewhere and merely wash up on the beach. Then the writers don’t have to worry about how to hide the body at the scene of the crime.

 

 

Photo credits: Patti Phillips at the North Carolina OBX.

 

 

 

 

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