In his new memoir, “Heartbreaker,” Mike Campbell recalls an afternoon in the early ’70s when Tom Petty — Campbell’s bandmate in a Gainesville, Fla., cover band called Mudcrutch — played one of his songs.

Heartbreakers guitarist Mike Campbell insisted his "conscience is clear" over his bandleader Tom Petty's 2017 death from an accidental drug overdose. "I don't torture myself [over Petty's death]," Campbell,