Richard Rogers preyed on gay men he met in bars and clubs, dismembering them and leaving body parts in trash bags strewn alongside roads in three states.

In the late 1960s, Liza Rodman spent summers hanging out with Tony Costa, the handyman at the Royal Coachman hotel, where her mother worked. One of the many people Liza's mom enlisted to watch the 8-year-old and her sister, Tony was also a serial killer.

Jeffrey Dahmer was just 18 when he committed his first murder, much younger than the average age of serial killers, which researchers have determined is around 29 years old. Why did he wait nearly a decade before killing his next victim?

SVU detectives are trained and equipped to handle cases involving sexual assault, abuse and interpersonal violence. Hear from one detective what it's like working a real-life SVU.

In the 1960s, an unidentified serial killer terrorized London sex workers. The Hammersmith Nude Murders remains one of Britain's most infamous unsolved crimes.

Josef Fritzl imprisoned his daughter Elisabeth for 24 years in a windowless basement. When she finally emerged in 2008, the story of his sadism shocked the world. Read about this shocking case.

Sex trafficking is big business. Globally, it generates tens of billions of dollars in profit every year. Here in the United States, it ensnares hundreds of thousands of victims. And while the stereotypical image of a trafficking victim is a foreign national, many of the exploited are underage American girls.

Serial killers have long targeted prostitutes—from Jack the Ripper, an uncaught murderer who terrorized women in late 19th-century London, to the Long Island Serial Killer, an uncaught murderer whose last confirmed victim disappeared in September 2010 after advertising sex work on Craigslist. We explore the various reasons why serial killers prey upon sex workers.

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.

What causes adults to kidnap children? The perpetrators range from serial rapists to parents trying to protect their sons and daughters.