He was jailed for life in 2014 after being convicted of three murders.
Since May 2018, Texas Ranges and the Federal Bureau of Investigation have been working to confirm his confessions and asked the public on Sunday for its help in identifying his assumed victims.
"For many years, Samuel Little believed he would not be caught because he thought no one was accounting for his victims", Christie Palazzolo, an analyst with the FBI's Violent Criminal Apprehension (ViCAP) Program, commented.
Samuel Little, who has been behind bars since 2012, told investigators past year that he was responsible for about 90 killings nationwide between 1970 and 2005.
Many of Little's victims were originally thought to have died from overdoses or in accidents, the Federal Bureau of Investigation said.
The FBI also asked the public for help determining the identities of five of Little's potential victims - one man and four women - in Florida, Arkansas, Kentucky, Nevada and Louisiana.
His case, featured on "60 Minutes" on Sunday, has offered a frightening look inside the mind of a killer and the wrongheaded assumptions on the part of law enforcement that enabled him to escape justice for so long.
Little confessed to killing Lane in November 2018, describing specific details about where her body was found and the clothing she was wearing, according to Perry police chief Jamie Cruse.
Little said he deliberately targeted people whose disappearances or deaths would not be a surprise - drug addicts, grifters and prostitutes.
Those three victims, all women, were beaten and strangled. He was released, and told investigators that he drove down a dirt road outside Little Rock and "manually strangled the woman to death".
Each case presented is accompanied by a video of Little explaining the incident and a hand-drawn photo by Little of the woman.
Holland noted that Little liked to draw and gave him art supplies.
Authorities in Knox County, Tennessee, said Monday that a woman named Martha Cunningham was likely a victim of Little's. He confessed to slaying an unidentified white woman in 1970 or 1971 in Homestead and another woman killed in 1971 or 1972, who possibly worked on Homestead Air Force Base.
Notorious killers such as John Wayne Gacy and Ted Bundy were convicted of killing around 30 people each but were both suspected of more.
For years Little denied that he was responsible for any of them.
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