We spoke with Joni Johnston, a forensic psychologist, to explore the ancient legacy of poisonings, the psychological profile of a homicidal poisoner and common myths and misconceptions about those who poison.

Without a body, proving that someone has committed murder is difficult but not impossible. More than 500 no-body murder trials have been held in the United States, with a conviction rate higher than that of all murder trials.

In today's world, homicide detectives are expected to be jacks-of-all-trades: equally adept at chasing outlaws and identifying DNA evidence at the scene of the crime. But, in an overwhelmingly male-dominated field, Frances Glessner Lee, a Midwestern woman without a high school diploma, made contributions throughout the 1930s and 40s that earned her the moniker 'The Mother of Forensic Science.'

You may have heard about body farms, the research facilities where people donate dead bodies for scholarly research. But have you ever wondered what goes on in these places? What exactly are scientists doing with all these donated bodies? What mysteries are they trying to solve, and why?

When new evidence arises, or new technology becomes available, investigators may need to take a second look at a corpse.

Genealogical DNA databases are helping solve more cold cases. We explore why that could be problematic.

Part of the reason so many serial rapists go unprosecuted is because of a rape kit backlog. We take a look at why such a backlog exists, what can be done to catch more sexual predators and how law enforcement and others can help sexual assault victims.

The true crime audience skews largely female, sparking some to question why the genre is so popular among some women. But in Rachel Monroe's book 'Savage Appetites,' she reverses that gaze, turning the lens toward four women who she thinks embody or challenge four classic archetypes of the genre: Detective, Victim, Defender and Killer.

Ever since 'Golden State Killer' suspect Joseph DeAngelo was arrested in April 2018 after being tracked down with the help of an online DNA database typically used for tracking genealogy, crime-solving via genetic genealogy has increased. Last year, investigators made more than 20 arrests in cold cases. But given that there are thousands of murders in America every year, of which 40 percent go unsolved, why aren't DNA databases being used to solve even more crimes?

Since the 2017 murder of Indiana teens Libby German and Abby Williams, local authorities have not released any information about the cause or time of death of either victim, leading to rumors and speculation. We spoke with Indiana State Police First Sgt. Jerry Holeman about why the police are holding back details about the murder.