Video: Injuries on Zimmerman's Head?

Maybe George Zimmerman sustained head injuries on that fateful night after all, Huffington Post reports. Video of Zimmerman at the Sanford police station, enhanced for ABC News, shows what could be an injury on the back of his head. In Zimmerman's account, Trayvon Martin attacked him from behind, punched him, and slammed his head into the sidewalk. ABC reporter Matt Gutman describes the marks as "a pair of gashes or welts." (However, the funeral director who prepared Martin's body for burial said he saw no signs the boy had been in a fight. And Bill Maher has called Zimmerman "a big fat f**kin' liar.")