Sam Little's horrific killing spree happened across the United States between 1970 and 2005.

The Federal Bureau of Investigation is seeking help in identifying the victims of one of America's most prolific serial killers. Sam Little has confessed to killing 93 people over 75 years.

Investigators have confirmed over 30 of the murders. Little would find vulnerable victims from society, strangle them and leave them in the woods.

The killer made a strange offer to investigators: he would paint pictures of his victims. The Bureau has shared them online.

"Hispanic female in her 40s. Killed in 1988 or 1996. Victim possibly from Phoenix."

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"White female killed in 1997. Victim possibly called 'Ann.'"

"Black female between 28-29 years old killed in 1984. Victim picked up in Memphis, Tennessee."

"White female between 23-25 years old killed in 1996."

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The entirety of Little's confessions is available here. The FBI is actively seeking information. So far, 8 victims have been matched with open cases.