What is evil—and how do we measure it? Is it more evil to abduct and torture a stranger for days before ultimately letting them go, or to fatally shoot a spouse in a fit of jealous rage? We speak to clinical psychologist Dr. Gary Bucato, co-author of the new book, 'The New Evil,' about how he determined what acts are more evil than others and why serial killers aren't all categorized the same way.

The 2016 mass murder of seven members of a Pike County, Ohio family (plus a fiancée of one of the men) may become the largest homicide investigation in the state's history. After a two-and-a-half-year investigation, in late 2018, the Ohio Attorney General's Office arrested four members of another local family, the Wagners, for the murders. But what's the connection?

An ex-offender describes learning of his release—and preparing for it—after over three decades behind bars.

Samuel Little murdered as many as 93 women, some almost a half century ago. But all these years later, he still remembers their faces. A&E True Crime spoke with sociology and criminology professor Jack Levin, who explained how serial killers remember their victims and why these details are so important to them.

Where is Stacy Peterson? Stacy, the fourth wife of Drew Peterson, who was convicted of murdering his third wife, Kathleen Savio in 2012, has been missing since October 28, 2007. Although Drew Peterson is a suspect, he has never been charged. However, some people claim to know what happened and where Stacy's body is.

There's a new epidemic coming to light in Alaska—and in other areas around the U.S.—where hundreds, and possibly thousands, of Native American women are turning up missing or murdered. But legislative, funding and awareness-raising efforts are under way, and the issue is getting some political traction from the #MeToo movement. .

Serial killer Ted Bundy had a chameleon-like ability to deftly change appearances—whether physically or with the help of costumes and props—which helps explain why the vicious killer was able to evade police for so long.

Kerri Rawson, daughter of Dennis Rader, otherwise known as serial killer BTK, talks to A&E True Crime about her struggle to reconcile the man who raised her with the one who, for years, terrorized her hometown of Wichita, Kansas.

A&E True Crime investigates what life might be like for Chris Watts, the 33-year-old-Colorado man who pleaded guilty to murdering his wife and two daughters in November 2018, at the Dodge Correctional Institution in Waupun, Wisconsin.

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.