ROCKY HILL, Conn. (AP) — Connecticut's top state prosecutor will soon retire after a 47-year career that included winning convictions against a serial killer.

Democratic Gov. Ned Lamont announced Tuesday that Chief State's Attorney Kevin Kane plans to retire Nov. 1. Kane has held the post since 2006, making him the longest-serving chief state's attorney since the office's creation in 1973.

Kane became a state prosecutor in 1972 in Middletown. He rose through the ranks and later served as New London state's attorney for over a decade.

Kane prosecuted Michael Ross, who killed six women in eastern Connecticut and two in New York in the 1980s. Ross was executed in 2005, the last person in Connecticut to receive the death penalty before the state abolished capital punishment in 2015.

Kane's successor has not been named.