BARTOW, Fla. (AP) — A man who told police that he was responsible for a pair of unsolved Lakeland homicides from the 1980s has been sentenced to 40 years in prison.

As part of a deal with Polk County prosecutors, 48-year-old Anthony Jackson pleaded no contest earlier this month to two counts of second-degree murder and one count of attempted robbery.

The Ledger reports that Jackson’s conviction is related to the 1984 slaying of William Clark Ford Jr. and the 1985 killing of 16-year-old Sharon Cheryl Boyce.

For years, the two fatal shootings remained cold cases until Jackson called 911 on Dec. 10, 2011, and asked officers to meet him on a street corner in Tampa.