(Odessa, TX) — The FBI is hoping sketches drawn by a serial killer will help to connect him to cold cases around the country.

Samuel Little is serving a life sentence in Texas after DNA results linked him to the unsolved murders of three women in the late 1980s.  The 78-year-old former boxer has confessed to 90 murders and has drawn 16 of his victims from memory.   The FBI has released the sketches to the public hoping to get help in identifying the women.  Authorities say Little may be one of the most prolific serial killers in U.S. history.

So far investigators have been able to confirm that he killed more than 30 people.