DALLAS — A man convicted of three California murders and long suspected in numerous other deaths now claims he was involved in about 90 killings nationwide spanning nearly four decades, and investigators already have corroborated about a third of those, a Texas prosecutor said Thursday.

Ector County, Texas, District Attorney Bobby Bland said 78-year-old Samuel Little was booked into jail this week following his indictment in the 1994 death of a Texas woman.

Investigations are ongoing, but Little has provided details in more than 90 deaths dating to about 1970, Bland said.