That’s not true.
That’s what I have read!
From the Wall Street Journal...
Violent ‘knockout game’ a national phenomenon
http://online.wsj.com/article/APa2d6bf76647e475a9d4576667abf4dda.html
An editorial in the St. Louis paper in 2011 likened the game to behavior described in “A Clockwork Orange.”
In 1992, police in Cambridge, Mass., said three drunken teenagers decided to play “knockout” and randomly targeted an MIT student, according to news reports. After the student was knocked to the ground, a 16-year-old stabbed the victim to death as he tried to get up.
The defendant in that case, Shon McHugh, was sentenced as a juvenile to 20 years in prison.