MIAMI — Former FBI agent John Connolly was convicted Thursday of second-degree murder for leaking information to Boston mobsters that led to the 1982 shooting death of a gambling executive who also had ties to gangsters.

Jurors deliberated about 13 hours over three days before delivering the verdict following a two-month trial. The jury acquitted Connolly of first-degree murder conspiracy, but he still faces a maximum of life in prison when sentenced Dec. 4.