Samuel Little, 78, has been in prison since 2012 and prior to that, he traveled the country for more than three decades murdering women, one of whom was killed in Northern Kentucky.

KENTUCKY (The Enquirer) -- Samuel Little is 78. He's been in prison since 2012. Prior to that, he traveled the country for more than three decades murdering women, one of whom was killed in Northern Kentucky.

And he says he has killed Northern Kentucky.

Little was arrested at a Louisville’s Wayside Christian Mission, a homeless shelter, in 2012. He was extradited to California on drug charges, and once there his DNA was quickly matched to three unsolved homicides in the 1980s. He was sentenced to life in prison.

This spring, Little wanted to move to a different prison. The FBI and other investigators had long suspected he had killed other people. In exchange for moving, Little started talking.

He confessed to 90 murders, investigators said, many of which he remembers in great detail.

His killings span the country from the east to the west coast with incidents in 16 states.

The FBI has confirmed 34 of Little's murders and continue to investigate the others. Both of the confessions to local killings are unconfirmed.

In Northern Kentucky, Little said he killed a white female in 1984. He said he met her in Columbus and disposed of her body across state lines.

Little says he also killed a black woman in 1974 in Cincinnati.

The Ohio Attorney General's Office keeps comprehensive records of unsolved homicides in the state.

Two unsolved deaths from that year involved black females in the Cincinnati area, but neither death matches Little's profile.

Five-year-old Angela Tucker was killed in a fire in Over-the-Rhine that was ruled an arson. Seventy-year-old Mattie Broadus was stabbed to death in a Downtown apartment.

But Little knocked out his victims and strangled them. They were often prostitutes or other vulnerable women.

"Many of these deaths were not classified as homicides but attributed to drug overdoses, accidents, or natural causes," the FBI said.

There are two other unconfirmed killings Little confessed to in Ohio. He said he killed a black woman in 1978 or 1979 in Cleveland and a white woman in 1991 or 1992 in Akron.

None of the unsolved homicides listed by the Ohio Attorney General for Cleveland and Akron match those victim descriptions and the profile of Little's killings.

Little is in poor health and will likely stay in prison in Texas until his death, investigators said.

"The goal now is to identify his victims and provide closure and justice in unsolved cases," the FBI said in a press release.