There were three homicides or suspicious deaths on cruise lines operating in U.S. ports in 2017. And authorities have also reported over a hundred other crimes, including sexual assaults and kidnappings. But some advocates say even more crimes are taking place aboard.

The Richland County Sheriff's Department officer spoke with A&E True Crime about how being in the military and in law enforcement are similar, how social media has impacted policing and the importance of police transparency.

On January 13, 1982, there were two major accidents in Washington D.C.: a commercial plane crashed and plunged into the Potomac River, and a Metro train derailed. Police officer Steven O'Dell was deployed to the plane crash site and tells his story of working through the chaos.

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.

James Atkinson, who has spent decades designing and installing listening devices for the FBI, CIA and other agencies, tells A&E True Crime about some of the dangerous undercover work he's done and unusual things he's bugged.

Sgt. Ryan Wisniewski, part of the San Diego County Sheriff's Department's UAS (unmanned aircraft system) Unit, spoke with A&;E True Crime about how drones are used by—and against—law enforcement today.

As smart technology advances, so does the means for authorities to detect crime. A&E True Crime looks at some of the more memorable cases of criminal clues in the Wi-Fi age.

Andrew Walsh, deputy chief of the Las Vegas Metropolitan Police Department, on how he used a mannequin as a decoy to catch a suspect in the murders of two homeless men.

Dep. Chris Mastrianni discusses the moment when he had to tackle a suspect holding a child, misconceptions about policing and the importance of body cameras.

In an excerpt from Pistols and Petticoats: 175 Years of Lady Detectives in Fact and Fiction by Erika Janik, see how one early policewoman helped solve a sensational murder and the vital role the first policewomen played in busting prostitution rings, finding missing people and more.