An elderly man incarcerating in California might be America’s most prolific serial killer, according to a Texas prosecutor.

“A Texas prosecutor said Friday that investigators have linked more than 60 killings in at least 14 states to a 79-year-old California inmate who may be the most prolific serial killer in U.S. history,” according to Associated Press.

Samuel Little is cooperating with Ector County, Texas District Attorney Bobby Bland as his health fails in a California prison, helping Bland to link Little to 50 killings across the country in February, some which are cold cases from the 1970’s. Since February, the number of confirmed kills linked to Little has increased to more than 60. Little lived his life as a nomad and claims to have killed 93 women.

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He was sentenced to several life sentences in California after being convicted of killing three Los Angeles-area women. He also pleaded guilty in the murder of a Texas woman. All of his appeals have been exhausted, and he has decided to cooperate fully with authorities.

He was indicted last week for the murders of two Cincinnati women nearly 40 years after allegedly committing the crimes.

Police at the time were investigating the deaths of women in eight states whom they thought might have been victims of Little.

America’s most prolific serial killer before Little was Gary Ridgway, known as the “Green River Killer,” pleaded guilty to killing 49 women, but claims to have killed 71. He remains locked up in the Washington State Penitentiary.

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