by a plain clothed police officer and what police call a case of mistaken identity. he was in front of his hotel and waiting for a car to take him to the u.s. open and an unidentified man rushed him. >> i thought it was a high school friend i didn't recognize and hug me. he didn't. he picked me up and hit me to the ground and turned me over. >> reporter: blake says the plain clothed officer did not identify himself nor did he say why he was being held. there were six officers involved in the incident. all were white. blake is biracial. the commissioner bill bratton says this is not about race, but mistaken identity. he says blake looked very much like the suspect police believed they were looking for. police have video of the