There are more Latino gang members in the US than black gang members. But, black gangs are more widespread throughout the county. Everyone is right. Everyone is wrong. Lawlz, he is not saying that blacks are worse than anyone.
Honestly, if you truly want to correct the problem, don't go to the police. You can't convince them to stop treating blacks as equally likely suspects as whites, because blacks do commit more crimes.
Instead, try to correct black neighborhoods, and destroy black gang culture (which frankly, is highly encouraged).
There is truth to this, whether you think so or not. There has been an increase of the "f*ck the police" way of thinking within black communities, which contributes to more gang members.
I will also say that parents need to start parenting again, throughout the whole country, no matter which color anyone is. This would solve a LOT of problems.