In one of the studies I read on that particular item, and I'm wandering from my original question, they found that by communicating clearly to the criminal element—especially in those regions of the city that were having a problem with gangs—that there were increased penalties, it actually brought gun crime down. Not only do we have to implement this, but we also have to clearly communicate that there is now a much more serious thing.
I throw that out as one of the studies I read about that was very effective in bringing down gun crime.