Peter Vronsky, author and investigative historian, speaks with us about ancient killers, the influence of technology on crime and how, in 100 years, the Long Island Serial Killer could be the new Jack the Ripper.

Read an excerpt from FBI Special Agent Jeffrey L. Rinek's book, 'In the Name of the Children,' about his interrogation of Yosemite Killer Cary Stayner over pizza.

Some studies claim male sexual-homicide offenders over age 50 are rare—murders committed by them account for only 0.5 percent of sexual homicides in the U.S.—which may be due to steep declines in their testosterone levels. But could a decline in testosterone really put a halt to a killer's murderous spree?

Gary Leon Ridgway, who raped and murdered more than 49 women, was obsessed with deviant sex and visiting prostitutes. This, combined with his aggression and violence, were significant driving forces behind his murderous actions, says Mary Ellen O'Toole, a retired FBI senior profiler who interviewed Ridgway.

Read an excerpt from Anne K. Howard's book, 'His Garden: Conversations with a Serial Killer' where William Devin Howell gives details about how he murdered and disposed of some of his victims.

Tricia Griffith, who runs the web forum Websleuths, talks to A&E True Crime about her close encounter with Ted Bundy, how the online community dug into the Casey Anthony case and why she believes police should let amateur detectives help investigations.

A&E True Crime talks to retired FBI profiler Dr. Mary Ellen O'Toole about serial killers, like Ted Bundy and the Toolbox Killers, who had well-defined victim preferences.

Bryanna Fox, Ph.D, former FBI agent and researcher at the bureau's Behavioral Science Unit, talks to A&E True Crime about whether convicted serial killers are the key to catching active serial killers.

Even though there have been 51 strangulation murders of women in Chicago that have gone unsolved between 2001 and 2017, Chicago police have been reserved about acknowledging they may have a serial killer on their hands.

Dr. Ashley Hampton, a licensed psychologist who works in the prison system with both victims and perpetrators of violent crime, tells us about how the traumatic childhoods of Charles Manson, Aileen Wuornos and Richard Ramirez may have shaped their adult behavior.