Murder Money, by Jay Bennett (epub/Kindle/pdf)
$100,000. What would you do if you found so much money on the back seat of a taxicab?
Eddie Doran figured he'd keep it. The money was all in small bills. Untraceable. Probably a payoff of some kind. Or a pick-up. Racket money. Dirty money.
Dirty or not, Eddie needed that dough. He was broke. Dead broke, and through as a fighter.
The briefcase with the money in it was like manna from heaven.
Only it wasn’t. It was sudden death wrapped in tight green bundles -- a present straight from hell.
From that moment on, Eddie was a marked man...