"Full Moon," by Lauren Davis, in Dallas Noir, edited by David Hale Smith, Akashic Press, 2013.
For those who came late, here's what noir is: A loser tries to be more, gets involved in crime (on one side or the other) and gets screwed.
This is a pretty good one.
Danny Contreras is an investment broker, but not destined to be one long. He is using drugs like they were dental floss and giving his Rolex to the dealer in lieu of payment. On the way back to his apartment he has an accident and winds up with a ton of money. He also has some bad guys following him. And possibly another companion: a giant owl out of Mexican legend . Whether the owl is real or in his head, it doesn't mean anything good.