Book summary “Behind the yellow tape”: summary

Introduction

You likely view crime scene investigation through the lens of glossy television dramas. These shows depict glamorous investigators solving murders in pristine laboratories within an hour.

This illusion masks a tedious, gritty, and meticulous profession. Real forensic work involves enduring harsh weather, grueling physical labor, and gruesome biological realities far removed from Hollywood fiction.

Behind the yellow tape lies a world of painstaking documentation, improvised field techniques, and psychological endurance where science meets human tragedy.

Jarrett Hallcox reveals the unvarnished truth about criminal investigations across America. You will discover how investigators process clandestine graves, recover evidence underwater, and revive forgotten cold cases.

• What are the actual physical and mental tolls of processing a gruesome crime scene?
• How do investigators handle rural homicides without high-tech laboratories nearby?
• What techniques unlock secrets from decades-old cold cases?

1. Reality of Forensics

Real crime scene investigation involves difficult sensory experiences and tedious work that starkly contrasts with fictional depictions on television.

Television shows heavily overglamorize forensic work compared to its harsh physical and mental realities. You encounter scenes that demand immense sensory endurance rather than glamorous leaps of deduction.

If prospective applicants had to see and smell the actual crime scenes you encountered, forensic applications would plummet. Television detectives maintain impossible standards of neatness while solving complex murders within sixty minutes. You spend hours doing tedious paperwork and processing microscopic traces of physical evidence.

The authors explicitly criticize the smug demeanor of Horatio Caine on CSI: Miami. That fictional confidence misrepresents the grueling nature of the forensic field. Real investigations require patience and tolerance for unpleasant environments.

2. White Lightnin

Investigating rural homicides requires archaeological precision when excavating clandestine graves and processing trace biological evidence.

Television shows create the CSI Effect by making forensic work look instantaneous. You rarely see the grueling patience required to process rural crime scenes. Suspects often use chemical agents to remove biological traces from vehicles and homes. Despite a suspect's heavy reliance on bleach to destroy biological traces and pressure-washing vehicles, investigators systematically check hidden surfaces to locate microscopic drops of blood.

Detective Jeff McCarter found tiny drops of blood on the underside of carpet sections, on a door, on rubber boots, on a mop bucket, and on the underside of the tailgate of John Blair's pressure-washed truck.

Forensic Methodology

Exhuming a clandestine grave requires treating the site with archaeological precision rather than rushing straight to the body. Investigators must avoid the natural instinct to immediately unearth a victim. Instead, they work slowly from a distance toward the body, marking evidence, casting tire tracks, and photographing every inch.

Sevier County CSIs utilized techniques learned at the Body Farm, conducting an archaeological dig starting far from Kelly Sellers's grave and taking over six hours before ever reaching her body. The Body Farm outdoor forensic laboratory has operated for 30 years.

When you process a clandestine burial site, follow these steps:

• Start the search far from the clandestine grave rather than rushing to the body.
• Work slowly and methodically toward where the body lies.
• Mark evidence along the way and mix dental stone for casting tire tracks.
• Photographically document every inch of the crime scene before exhuming.
• Keep the buried body wrapped in its tarp as long as possible to preserve evidence.

Trial and Evidence

Advanced mitochondrial DNA profiling can link familial DNA sources when hair samples lack roots for full nuclear DNA testing. When hair shafts lack roots, standard full-profile DNA testing is impossible, but mitochondrial analysis can narrow suspects down to a maternal familial lineage.

The FBI's mitochondrial laboratory analyzed hairs clutched in Kelly Sellers's hand, establishing they came from an immediate family member of John Blair, marking the first time this analysis was admitted in a Sevier County courtroom. The jury deliberated for 4 hours before finding John Blair guilty of first-degree murder.

3. The Crying Game

Close collaboration with prosecutors and improvisational forensic techniques drastically improve homicide clearance rates.

Unlike jurisdictions where prosecutors operate on a separate island, Boone County prosecutor Linda Tally Smith works directly with investigators to build stronger cases and understand evidence collection. By sending investigators to advanced training and dedicating them exclusively to crime scenes, the department achieved unprecedented results.

In Boone County, Kentucky, the average time to make an arrest is under sixteen hours, 68 percent of violent crimes are cleared, and there has not been a single unsolved homicide since 2001. This performance towers above the national average for clearing homicides, which sits at 40 percent.

Latent Fingerprint Recovery

Because environmental conditions and surfaces vary wildly at crime scenes, you must apply a practicing art rather than relying solely on pre-packaged commercial tools, utilizing creative problem-solving to secure physical evidence.

Detective Tim Carnahan and Detective Brian Cochran improvised solutions such as using safety pins bent into fishhooks to anchor string to greasy shag carpet for bloodstain trajectory stringing.

Porous or unwieldy large surfaces like plastic tarps can be successfully processed for latent fingerprints using custom-built superglue fuming chambers and fluorescent enhancement. By constructing a large frame enclosed in industrial plastic wrap, you can expose all sides of a hanging tarp to superglue vapors. The cyanoacrylate fumes adhere to the ridge details of oily prints, which are then rehydrated with a dye stain and inspected under a forensic light source.

Detective Tim Carnahan built an improvised fuming chamber using industrial pallet wrap, superglued two eight-by-ten blue plastic tarps from the John T. Snow murder case, and successfully lifted a nearly complete left thumbprint matched to Snow.

Follow these steps to process large plastic items:

• Construct a large frame that allows the tarp to hang completely inside the container with both sides exposed.
• Contain the fumes using industrial plastic wrap to form the walls of the box.
• Place a test print on the inside of the plastic to confirm the fuming process is working.
• Dab superglue into a small pan, heat it to give off gaseous vapors, and use a fan to circulate them.
• Examine the tarp inch by inch with a fingerprint loupe after fuming.
• Hit areas showing ridge detail with a fluorescent dye stain like Ardrox and view them under a forensic light source.

4. Extreme Environments and Underwater Forensics

Harsh winter weather and subzero temperatures create severe obstacles for crime scene investigators, destroying physical evidence and rendering standard investigative tools unreliable.

Harsh winter weather and underwater recoveries demand specialized techniques and improvised field filtration methods.

Snowfalls over 0.25 inches of snow ruin footwear impressions as shoes accumulate snow and tracks cave in or drift over. Cold, dry climates reduce sweating and oil production, resulting in fewer fingerprints, while investigators wearing winter gloves leave fewer prints. Subzero temperatures deplete camera batteries within two or three shots, freeze ballpoint pen ink instantly, and bullets burn completely through snowbanks, requiring firehoses to melt hillsides to locate spent rounds.

Duluth crime scene investigators frequently deal with extreme freezing conditions where keys put in the mouth to free hands freeze instantly to the skin, mirroring the flagpole scene in A Christmas Story.

Underwater Forensics

Underwater crime scene investigations rely on predictable decomposition stages and physical drift rules rather than eyewitness memory or inaccurate assumptions about currents. Drowning victims thrash violently at the point of entry, meaning bodies are almost always found very near the initial entry spot unless eyewitnesses misidentify the location. The general rule of thumb dictates that a body drifts about 1 foot horizontal drift for every 1 foot vertical fall. As decomposition occurs, bacterial gas production creates reflotation intervals where the body bloats and rises to the surface before sinking again, typically occurring 24 to 72 hours after death.

St. Louis County investigators pioneered using a mini-submarine remotely operated vehicle or ROV to locate and retrieve a dead snowmobiler from the bottom of a dark, frozen lake in position found using the sub's clamp arm, avoiding the high costs of equipment that once reached 100,000 dollars.

Forensic Case Studies

When blood permeates snow at an outdoor crime scene days after an incident, investigators can excavate the frozen layers and utilize simple kitchen items to process the sample for laboratory DNA analysis without destroying the integrity of the genetic material. In the Erik Schrieffer murder case, Duluth investigators scooped up bloody snow and placed it into coffee filters set on top of foam cups to filter out the melting liquid, isolating the blood for DNA analysis. This approach supported cases like the assault of Deliena Lamberton, which resulted in a 158 months prison sentence for Edward Bergren based on bloodstain pattern analysis and area of convergence calculations.

When processing bloody snow in the field, you must follow these exact steps:

• Excavate the snowy area down to locate the layers of blood permeating beneath the surface.
• Scoop up the bloody snow using available field tools.
• Place coffee filters on top of foam cups.
• Put the collected bloody snow into the coffee filter to separate the melting liquid and isolate the blood.
• Send the filtered blood to the laboratory for DNA analysis.

5. Divining Intervention and Cold Cases

Cold case investigations rely on historical physical evidence, anthropological analysis, and experimental search tools.

Older investigations frequently suffered from poor crime scene preservation, lack of DNA collection, and reliance on witness interviews rather than physical traces. Later investigators must review old files, photographs, and stored fragments like teeth or latent fingerprints to apply modern techniques.

In the 1989 disappearance of Lloyd Floyd Thomas, initial investigators collected only six photos, a brandy bottle, and an undetermined alcohol bottle, with no DNA testing available at the time. In 2003, Investigator Pelletier organized the remaining case files.

Cold Case Investigation

Body divining rods can theoretically be used to locate buried human remains through the interaction of bone piezoelectric waves and the earth's natural electromagnetic field. Bones under pressure exhibit piezoelectric properties, theoretically emitting electrical waves upward. If unblocked by roots or concrete, these waves interact with the earth's electromagnetic field, causing divining rods to move or cross when walked over a buried body.

The authors and Bobby Moore used homemade divining rods made from dry-cleaning hangers and cardboard tubes while searching Blackwater Creek Park for the remains of Lloyd Floyd Thomas.

To search an area using this method, you can build and use homemade tools by following these steps:

• Cut the long portion of a wire dry-cleaning hanger in half and remove the hollow cardboard tube from the hanging part.
• Bend the metal pieces into the shape of an L.
• Insert the metal pieces into the straight cardboard pieces so the metal part can move freely.
• Hold the cardboard handles with outstretched arms and walk slowly and smoothly over the search area.

Forensic anthropologists compare skull morphology with statistical databases and photographs. Computer-aided superimposition checks anatomical features like eye sockets, brow ridges, and the glabella to determine probabilities of identity.

Dr. Doug Owsley at the Smithsonian Institution examined a partial skull found in Lynchburg in 1995, determining it belonged to an African American male over fifty, which the FBI later matched via computer superimposition to photos of Lloyd Floyd Thomas.

6. Texas Rangers and Modern Forensics

The Texas Rangers maintain a distinct, highly independent policing identity rooted in the Wild West, including special exemptions regarding their weaponry and jurisdiction. There are 116 Texas Rangers roaming the wild Texas terrain, tracing their ancestry back to the 1823 year. In 2006, they were involved with 886 murder cases in some capacity across the state.

Unlike standard police officers in the Texas Department of Public Safety who must carry a department-issue Sig Sauer, Texas Rangers are allowed to carry any firearm of their choosing. Their badges are traditionally crafted from 1947 or 1948 Mexican cinco pesos. They operate across the entire state with broad empowerment.

Ranger John Martin calmly explained that he simply shot a rampaging truck driver who was running over troopers, and he was never even questioned by authorities.

Dedicated cold case units like UCIT were established to reinvestigate poorly handled historic murders using advanced forensics and behavioral analysis.

Formed in 2002 after pressure from an influential family whose bedridden relative was wrongly accused of murder due to atrocious police work, the Unsolved Crimes Investigation Team consists of eight full-time Rangers dedicated to cold cases and unusual murders.

Ranger Al Cuellar re-examined a botched 1990s murder case where investigators had only collected four cigarette butts and blamed a bedridden husband, leading eventually to the identification of the real killer, Billy Sutherland, through advanced DNA testing. The wrongful murder accusations against the bedridden husband lasted six years.

Behavioral analysis provides vital psychological perspectives on crime scenes, but it frequently triggers friction with traditional police officers wedded to preconceived pet theories. Investigators often form premature opinions at a crime scene and become emotionally invested, causing them to miss contrary behavioral indicators. Behavioral analysts look at the offender's perspective, the victim's role, and motivations, but their assessments are often polarizing.

In the Christina Moore murder case, local police fixated on the husband based on superficial inconsistencies like an overturned coffee cup, while Ranger John Martin correctly deduced from the entry point that it was a sexual homicide committed by an outside predator, a theory later proven when Michael Moore was arrested.

7. Back to the Future

Current forensic workflows suffer from multi-month backlogs, reducing their utility in locating suspects. Forensic science should function as a real-time investigative tool utilized within the critical first forty-eight hours rather than merely a prosecutorial tool months later.

Integrating wireless technology and rapid-screening tools can transform forensic science into a real-time investigative asset.

A futuristic model utilizes wireless telecommunications, tablet PCs, remote case managers, and rapid-screening tools to transmit evidence and data instantly from the scene to the lab. You face a crucial window where odds of solving a case are halved after 48 hours.

In a futuristic scenario, a 7 person response team uses wireless SD cards, DNA-on-a-chip technology, and real-time video feeds to identify a suspect and make an arrest within twenty-four hours. They use a 700 MHz frequency for a Wireless Forensic Telecommunications Network, a 50 inch high-definition plasma screen television, and a vehicle called The Beast. It takes 10 minutes for DNA-on-a-chip to determine a profile and 8 hours to process the entire futuristic crime scene.

You can follow these steps during the investigation:

• Gather all available information from responding officers before processing the scene.
• Dress in anti-contaminating personal protective equipment and equip headsets for constant communication.
• Assign roles including scene processors, a videographer for live feeds, and a communications manager.
• Transmit digital photographs wirelessly to the laboratory for immediate enhancement and database submission.
• Collect DNA samples using rapid screening devices and submit shoe prints to pattern databases.
• Record notes, sketches, and evidence logs directly onto tablet PCs using bar-code scanning.
• Allow the remote case manager to filter and select only the most probative evidence for formal lab processing.

Establishing independent, private forensic laboratories can revolutionize the industry by providing fast, business-model-driven services across all core disciplines. Private laboratories modeled to handle all core forensic disciplines can offer an alternative for law enforcement agencies, defense attorneys, and private entities, helping eliminate backlogs and providing specialized expertise like forensic anthropology on demand.

Jeff Gurvis, at the age of 36, envisioned the National Forensic Support Laboratory to offer independent testing across DNA, firearms, trace evidence, drug chemistry, toxicology, latent prints, and questioned documents. Other facilities include a 5 acre plan for the Texas State University Forensic Research Facility and 30 years of operation for the Body Farm in Tennessee.

Conclusion

Real crime scene investigation unites patience, meticulous methodology, and adaptive tools to solve complex cases and bring closure to victims. You must look past television myths to grasp the gritty reality of processing evidence under harsh conditions. Success demands discipline, respect for physical traces, and collaboration across jurisdictions.

1. Preserve every crime scene with archaeological precision before collecting trace evidence.
2. Rely on rigorous forensic methodology rather than intuition or media-driven expectations.
3. Collaborate closely with prosecutors early to build airtight courtroom cases.
4. Maintain objectivity to overcome police bias and emotional fatigue during lengthy investigations.
5. Adapt standard tools to extreme environments and underwater recovery operations when necessary.
6. Revisit cold cases with modern anthropological analysis and updated testing technologies.

10 Key Ideas

1. Television shows create a false illusion of glamorous, rapid crime scene investigations, masking the tedious physical labor and harsh sensory realities of actual forensic work.
2. Exhuming clandestine graves requires treating outdoor sites with archaeological precision, working slowly from a distance toward the body rather than rushing to collect evidence.
3. Improvised field techniques like custom-built superglue fuming chambers and fluorescent enhancement allow investigators to successfully recover latent fingerprints from unwieldy surfaces like plastic tarps.
4. Close collaboration between prosecutors and investigators, as seen in Boone County, drastically improves homicide clearance rates and reduces the time needed to make arrests.
5. Extreme subzero winter weather destroys traditional physical evidence, requiring specialized field methods like using coffee filters on foam cups to isolate blood from melted snow.
6. Underwater crime scene investigations rely on predictable decomposition stages and physical drift rules, allowing advanced tools like mini-submarines to efficiently locate and retrieve bodies.
7. Cold case investigations utilize historical physical evidence, anthropological database comparisons, and experimental tools like wire dry-cleaning hanger divining rods to locate long-lost remains.
8. Dedicated cold case units such as the Texas Rangers' UCIT successfully reinvestigate poorly handled historic murders by overcoming traditional police biases and applying modern DNA testing.
9. Current forensic workflows suffer from multi-month backlogs that reduce their utility in solving cases within the critical initial forty-eight-hour investigative window.
10. Integrating wireless technology, tablet PCs, and DNA-on-a-chip tools transforms forensic science into a real-time investigative asset that can identify suspects within a single day.