Taxi!

When a veteran cab driver, Pop Riley (Guy Kibbee), refuses to be pressured into surrendering his prime soliciting location outside a cafe, where his daughter works, the old man's cab is intentionally wrecked by a ruthless mob seeking to dominate the cab industry. Upon learning of the "accidental" destruction of his cab (and along with it his livelihood), the old man retrieves his handgun and shoots the bullying man known to be responsible, which lands him in prison, where he dies of poor health in fairly short order.