The disgusting "knock-out game" attack (also referred to as "Polar Bear hunting" in certain communities) was captured on video. 
In the sickening surveillance video you can see the youth run up behind the unsuspecting victim and punch him in the head. When the victim falls to the ground the youth kicks him in the head before running off. Robbery was not a motive so we can surmise that this was a hate-crime of course it will never be charged as such. Fortunately the victims injuries were non life-threatening. Other victims of the "knock-out-game" have not been so lucky.
http://www.cbs8.com/story/29402499/surveillance-video-shows-mans-beating-at-la-mesa-transit-depot
In the sickening surveillance video you can see the youth run up behind the unsuspecting victim and punch him in the head. When the victim falls to the ground the youth kicks him in the head before running off. Robbery was not a motive so we can surmise that this was a hate-crime of course it will never be charged as such. Fortunately the victims injuries were non life-threatening. Other victims of the "knock-out-game" have not been so lucky. http://www.cbs8.com/story/29402499/surveillance-video-shows-mans-beating-at-la-mesa-transit-depot