1. Murder for Hire

For some killers, murder can be a lucrative business. When a victim has been targeted for death, investigators must dig deep and go beyond the obvious to uncover a murder for hire.

2. Toxic Death

Sometimes the cause of death does coincide with the scene of the crime. When an untraceable poison is used as a murder weapon, investigators rely on forensic toxicologists to follow a killer’s tracks and expose a toxic death.

3. Material Witness

Lies, deception and contradicting witnesses can often throw investigators off the trail of justice. But when indisputable evidence refutes a killer’s story, police must use the clues to piece together the truth.

4. Betrayed

Sometimes when a death seems to be accidental, forensics can reveal the deception just below the surface. Law enforcement uses a variety of techniques to uncover the hidden truths that reclassify cases from tragic accidents to cold-blooded homicides.

5. Elements of Murder

A murdered woman is found stuffed in the boot of her car, and a routine investigation reveals a wife may not have abandoned her family on purpose. When everyday substances reveal hidden clues that break a homicide case, those substances become the elements of murder.

6. Random Targets

Most victims are meticulously chosen by their murderer because of a connection or because they match a set of criteria. The most terrifying cases of murder occur when the killer appears to choose victims at random.

7. Grave Secrets

Killers often will try to cover up their crime by hiding the remains of their victims. Sometimes bodies may lay hidden for years before they are discovered. That’s when forensic scientists are called upon to reveal buried clues.

8. At Close Range

When a victim is killed at point-blank range, police often suspect that a friend or acquaintance is to blame, because for a stranger it would otherwise prove too difficult. Investigators must use the clues to track down the most unlikely killers.

9. Lethal Encounter

In most murder cases, police rely on motive to pursue a killer. But when the murderer is a stranger, the crime may go unsolved for years. Investigators must employ an arsenal of forensic techniques to trace these seemingly random lethal encounters.

10. Crimes of Passion

When killers are driven by jealousy, rage and desire, their desperation is evident in both the crime and their efforts to cover their tracks. But forensic science can reveal even the smallest mistake to solve these crimes of passion.

11. Absent Witness

When murderers hide or destroy the remains of their victims, forensic scientists must reconstruct the scenes and prove murder for an absent witness.

12. Marked for Death

Often killers are careful to not leave any fingerprints behind. But the methods of the murder itself can leave a lasting impression on authorities, especially when the tools of a killer’s trade leave a victim marked for death.

13. Fatal Abductions

Anytime, anywhere, people disappear – and sometimes these disappearances end in tragic murder. Kidnappers always leave clues behind, but chasing them takes time, hindering investigators’ attempts to solve these fatal abductions.

14. Medical Examiner's Casebook

Some killers choose to hide their victims and investigators must then rely on forensics to uncover proof of murder. From identifying remains to uncovering post-mortem clues, medical examiners are integral in solving some of the most brutal crimes.

15. Trial by Fire

At a crime scene, anything left behind or moved out of place is considered a clue. But a fire can extinguish everything in its path, challenging forensic investigators at every turn.

16. Undaunted

Solving crimes may begin with intuition but advanced science provides investigators with irrefutable proof to uncover staged accidents. When criminals go to great lengths to hide their crimes, skeptical investigators must remain undaunted.

17. Forsaken Trust

When victims of murder knew their killers, they can be caught off guard. The killers rely on their intimate knowledge to pull off the perfect crime. But even the best-laid plans leave traces of the forsaken trust.

18. Coroner Investigator

Coroners play a vital role in piecing together the final moments of someone’s life. Los Angeles County coroner Julie Wilson provides an in-depth look into the science of death, as well as the techniques and methodology used by coroner investigators.