To solve any problem you must get to the root of the issue--the Cause of Gun Violence is Poverty and Mental Illness.
For example, Chicago's poverty rate among black people is #1 in the nation at 32.2% AND Chicago leads the nation in Gun Murders in 2012 (over 500).
Mental Illness = Reason for Mass Shootings and the #1 cause of death in the USA--Suicides.
SOLUTIONS:
-Raise the Federal Minimum Wage: Currently 45% below the 1968 rate (AFI).
-Gang/Suicide Prevention: Early school-based social skills training, counseling, mentoring, and parent training for early detection.
-Education Finance Reform: More funding for poorest schools.
-Incentives for Job Creation in poor areas.
-Job Training for at risk youth.
-Drug Treatment costs ~75% less than prison and re-arrest rates are ~26% lower.