Man Bites Off Police Officer's Nipple Off-duty Chicago cop 'lost a body part,' says doctor 23 comments Comments The cop 'lost a body part,' says his doctor. (Shutterstock) (User Submitted) – An off-duty Chicago police officer was allegedly bitten in the nipple so severely that he "lost a body part," according to his doctor. Fernando Cooper, 31, reportedly got in a scuffle with the cop outside a bar on Sunday night. Though the officer identified himself, say witnesses, Cooper refused to back down, punching him in the face and biting his chest. Cooper was charged with two felonies, NBC Chicago reports.