Transcript for New Video of Former Tennis Player James Blake Slammed to Ground By NYPD Officer
The American workers that helped to rebuild, that's a bit later. But the police takedown, the moment of mistaken identity. The sports star, slammed to a ground. Police say it was all a mistake. And gio Benitez, leading us off. Reporter: James Blake, standing outside his New York City hotel when an officer rushes up and tackles him. And then kneeling on top of him as he handcuffs him. People walking by. After about 40 seconds, he's led away. Blake, telling robin Roberts about the incident. Picked me up, body slammed me, put the cuffs on me. Reporter: That officer, ABC news learning he's had four misconduct complaints. I said, I'm scared. If I say something wrong, I'm sorry. But I think you have the wrong person. Reporter: The NYPD said it steps from a case of mistaken identity. Saying Blake looks like this man. Turning out also to be wrongly identified. The similarities are remarkable. Reporter: New York City's police commissioner and mayor both apologizing. And tonight, Blake tells us what happened to him is not uncommon. And he's determined to use his voice as a catalyst for change. Thanks. We'll turn to a possible break in the case in Phoenix.
This transcript has been automatically generated and may not be 100% accurate.