Revolver by Duane Swierczynski
Three generations torn apart–by bullets fired fifty years ago.
On the streets of Philadelphia in 1965, two street cops–one black, one white–are gunned down in a tavern robbery gone wrong. The cold-blooded killing stuns a racially-divided city. One of the fallen officers, Stan Walczak, leaves behind a 12-year-old boy, Jimmy.
Thirty years later, Jim Walczak becomes a Philadelphia Homicide Detective. His father’s killer–who was supposed to be sent to the electric chair–has been released from prison. Weeks later, Howard Lee Tate is found dead from a drug overdose. Did Jim do it?
Fast-forward to 2015. Jim Walczak’s daughter Audrey, studying forensic science in graduate school, investigates her grandfather’s 50-year-old murder for her dissertation. As Audrey digs deeper, she comes to a realization: the man convicted of killing Stan Walczak–Howard Lee Tate–didn’t do it.