(CNN) —
Samuel Little, the California inmate who claims to be one of the most prolific serial killers in US history, has been linked to 60 deaths, a Texas prosecutor said Friday.
Ector County District Attorney Bobby Bland said investigators have confirmed Little is connected to deaths in 14 states.
Little claims to have killed people between 1970 and 2005 in 14 states from Florida to California. Authorities had previously confirmed he was linked to 34 killings.
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Wise County Jail
Samuel Little has confessed to at least 90 killings.
Little, 79, is in a California state prison, according to corrections department spokeswoman Vicky Waters. He is serving life sentences for three murders.
He has been cooperating with investigators from different states and is in bad health, Bland said. In November, Little was charged in Ector County for a 1994 killing.
Little was indicted a week ago in Ohio, accused of killing two Cleveland women decades ago, according to a statement from the Cuyahoga County Prosecutor’s Office.
Prosecutor Michael O’Malley said Little has confessed to five killings in Ohio, including three in the Cleveland area. Cuyahoga County’s cold case unit was able to identify two of the three victims, O’Malley said.
Little is charged with four counts of aggravated murder and six counts of kidnapping in the deaths of 21-year-old Mary Jo Peyton in 1984 and 32-year-old Rose Evans in 1991, O’Malley said.
LIttle was indicted Friday in Hamilton County, Ohio, for two killings in the Cincinnati area in the 1980s.
Photos: FBI releases hand drawn portraits of Samuel Littles victims
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FBI
The FBI released these portraits drawn by confessed serial killer Samuel Little, who claims he's killed at least 90 people. He claims the portraits are of his victims. The FBI urged anyone with information about the victims to call the bureau's Violent Criminal Apprehension Program at (800) 634-4097.
Photos: FBI releases hand drawn portraits of Samuel Littles victims
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FBI
White female killed in 1997 in Phoenix, Arizona. Victim possibly called "Ann."
Photos: FBI releases hand drawn portraits of Samuel Littles victims
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FBI
Black female between 35-40 years old killed in 1981 in Atlanta, Georgia.
Photos: FBI releases hand drawn portraits of Samuel Littles victims
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FBI
White female, age 26, killed in 1983 or 1984. Victim possibly from Griffith, Georgia.
Photos: FBI releases hand drawn portraits of Samuel Littles victims
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FBI
Black female between 23-25 years old killed in 1984 in Atlanta, Georgia. Victim possibly a college student.
Photos: FBI releases hand drawn portraits of Samuel Littles victims
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FBI
White female killed in 1984. Met victim in Columbus, Ohio. Body disposed of somewhere in Northern Kentucky (city unspecified).
Photos: FBI releases hand drawn portraits of Samuel Littles victims
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FBI
White female between 20-25 years old killed in 1972 in Prince George's County, Maryland. Victim possibly from Massachusetts.
Photos: FBI releases hand drawn portraits of Samuel Littles victims
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FBI
Hispanic female in her 40s. Killed in 1988 or 1996. Victim possibly from Phoenix
Photos: FBI releases hand drawn portraits of Samuel Littles victims
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FBI
Black female between 25-28 years old killed between 1976 and 1979 or in 1993 in Houston, Texas.
Photos: FBI releases hand drawn portraits of Samuel Littles victims
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White female between 23-25 years old killed in 1996 in Los Angeles.
Photos: FBI releases hand drawn portraits of Samuel Littles victims
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Black female, age 40, killed in 1993 in Las Vegas.
Photos: FBI releases hand drawn portraits of Samuel Littles victims
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Black male, age 18, killed in 1971 or 1972 in Miami, Florida. Victim possibly called "Mary Ann" or "Marianne."
Photos: FBI releases hand drawn portraits of Samuel Littles victims
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FBI
Black female, age 24, killed between 1987 and the early 1990s in Monroe, Louisiana.
Photos: FBI releases hand drawn portraits of Samuel Littles victims
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FBI
Black female between 35-45 years old killed in 1977. Met the victim in Gulfport, Mississippi. Victim possibly from Pascagoula. Victim possibly worked at Ingalls Shipyard.
Photos: FBI releases hand drawn portraits of Samuel Littles victims
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FBI
Black female, age 26, killed between 1976 and 1979. Met victim in St. Louis, Missouri. Victim possibly called "Jo."
Photos: FBI releases hand drawn portraits of Samuel Littles victims
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FBI
Black female between 28-29 years old killed in 1984 in West Memphis, Arkansas. Victim picked up in Memphis, Tennessee
Photos: FBI releases hand drawn portraits of Samuel Littles victims
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FBI
Black female killed in 1976 or 1977. Body disposed of somewhere outside of Wichita Falls, Texas.
Little has told investigators he killed more than 90 people across the United States, the FBI has said.
A map on the FBI’s website says Little told investigators he killed women in these states — Arizona, Arkansas, California, Georgia, Florida, Illinois, Louisiana, Maryland, Mississippi, Nevada, Ohio, South Carolina, Tennessee and Texas — but the killings have not been confirmed.
The FBI is hopeful that portraits of women drawn by Little will help authorities to identify them and solve some cold cases. According to the FBI, Little chose to kill marginalized and vulnerable women who were often involved in prostitution or suffered from drug addiction. Their bodies sometimes went unidentified and their deaths uninvestigated.
Gary Leon Ridgway, dubbed the Green River Killer, pleaded guilty in 2003 to killing 48 women and was later charged with a 49th murder. The 49 guilty pleas gave Ridgway more murder convictions — though not necessarily more slayings — than any other serial killer in US history. He reportedly confessed to 71 killings.