Samuel Little, who has been behind bars since 2012, told investigators last year that he was responsible for about 90 killings nationwide between 1970 and 2005.

Samuel Little, who lived a nomadic lifestyle, claims to have killed dozens of women as he crisscrossed the country over the years.

He's suspected in the shooting death of 62-year-old Pamela Johnson; the killing of 28-year-old Allie Barrow inside a mattress store in Houston; and the fatal shooting of a man inside another mattress store in Houston.