Colin Flaherty is author of the book "White Girl Bleed A Lot: The Return of Racial Violence to America and How the Media Ignore It."
Tonight we'll talk to him about the so-called "knock out game".
Dangerous "knockout" attacks on strangers are leading to arrests, more officers flooding the streets and more warnings for vigilance by an unsuspecting public.
Perpetrators have dubbed the violent practice as the "knockout game," in which young people try to randomly knock out strangers with one punch.
Recent attacks in New York, New Haven, Conn., Washington, D.C. and suburban Philadelphia have raised concerns across the country. The violence is not new, though. In 2011, St. Louis had a rash of similar incidents, one of which led to the death of a Vietnamese immigrant.
Some of the assaults are recorded and posted on social media by the attackers.
Colin Flaherty joins us with his take on these so-called knock out games.
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