Mario Pepper

Mario Pepper was a mentally unstable ex-con, abusive father and the person framed for the murders of Thomas and Martha Wayne. He was later shot and killed by Harvey Bullock.

Biography
Given his wife's bruises on her face, and his daughter's assertion at the door that "He's mean.", it seems reasonable to conclude that he was a domestic tyrant. Alice's later statement that "God knows, my husband had his demons," would appear to support this as well as James Gordon stating he was currently on parole. When Detectives James Gordon and Harvey Bullock visited Mario Pepper (and his family) during the investigation of the murder of the Waynes, Mario quickly ran off but was chased down by James. He would later be killed by Harvey Bullock in defense of James' life. However given that his wife and daughter still loved him. It's very obviously likely he tried to overcome his demons.

Legacy
It was subsequently revealed that Mario was framed by Fish Mooney.[1]

Two years after his death, the real killer was revealed to be Patrick Malone - who killed himself shortly after being confronted by Bruce Wayne.[2]

Four years after his death, his daughter Ivy, now older and with new powers, starts a killing spree against those who hurt her, including the man who killed her father, Harvey Bullock.[3]