Actually, this was discussed on the radio this morning. There was a study done and the most unifying factor among criminals is not their race, but if they were raised by a single mother. (Please, that's not a knock against all single mothers.) But, if you remove that factor, the crime rate is virtually the same across all races in the US.
Also, I have a 10 1/2 year old son and I just can't wrap my brain around this one. I can not even imagine him doing something like this.