Watch Why We Had to Kill Bitch Full Movie Free Online 123Movies. Dead hookers, ice cream laced with marijuana, run-ins with the mob - it's just another average night for Kevin Spilker and his pals. To pass his film class, Kevin is following Eugene around for a day with a video camera and calling it a documentary. When the day is over, the question becomes: Has Kevin made the funniest student film of all time? Or has he made a truthful documentary about the wacky night they had to kill Eugene's abusive ex-girlfriend, Karen?