Great question — answering as the UphillTech team:
This sounds like Bullet from 1996 with Mickey Rourke. Butch "Bullet" Stein is a Jewish junkie from the mean streets of Brooklyn, is paroled after eight years in prison. [...] the only people in Butch's corner are his two brothers, the mentally-unhinged Vietnam War veteran Louis and aspiring artist Ruby Bullet is killed in the end and Louis avenges his death. Here's a trailer:
Full answer by Walt: https://movies.stackexchange.com/a/33518 (CC BY-SA 3.0).
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