Back in 2012, police arrived at a Kentucky homeless shelter to arrest a relatively unassuming-looking middle-aged man. Samuel Little was no stranger to run-ins with the law — having been previously arrested for crimes ranging from shoplifting to fraud — so he offered no resistance as local police turned him over to California law enforcement, where his warrant had been issued.

However, once Little found himself in the custody of the Los Angeles Police Department, things quickly escalated beyond the narcotics charges he was wanted for: the DNA sample police took as they processed him came back as a match for not one murder in the city of Los Angeles, but three. Putting the man responsible for the murder of three people behind bars is a red-letter day for any law enforcement agency… but that was just the tip of the iceberg.

It wasn’t long before Little, by then facing multiple life sentences, started coming clean about other murders he claimed to have committed… but early on, his grandiose claims of dozens of murders seemed a bit like theater. It isn’t unheard of for a convicted killer to claim responsibility for other murders in order to gain infamy or social standing in prison, after all… but as police started comparing his claims to open cases, they came to a horrifying realization: It seemed Samuel Little may have been telling the truth.

Now, seven years after he first found himself behind bars for murder, the FBI released a statement over the weekend confirming that they have been able to link Little to a whopping 50 murders thus far, and that they believe the remaining 43 murder confessions to be credible. All told, the FBI now believes that Samuel Little was responsible for the slaying of 93 people, the vast majority of which were women he strangled to death with his bare hands.

The FBI has posted many of Little’s confessions on YouTube, so viewers can watch and contact them if his claims align with missing persons or homicide cases that have yet to be closed.

“He remembers where he was, and what car he was driving,” an FBI statement said about his claimed slayings. “He draws pictures of many of the women he killed.”

Perhaps the most troubling aspect of this decades-long murder spree was the fact that law enforcement around the nation weren’t hot on the trail of a woman-strangling serial killer, despite Little racking up a kill count that’s potential higher than the kill counts of John Wayne Gacy, Ted Bundy, Jeffrey Dahmer and Richard Ramirez combined. And we’re not talking about a serial killer that’s a relic of a bygone era: Little’s murder spree may have begun in serial killer-heavy 1970s, but it continued until the mid-2000s. For those that don’t believe serial killers can operate in the “CSI Era,” it’s worth noting that Little was still actively hunting women well into season 5 of the science-based crime drama. In fact, Little’s final kill came the same year CSI saw two spinoffs hit TV airwaves.