We have to make using a gun to commit a crime an undesirable option. The punishment must be harsher. Perhaps really tough punishments will deter some people. Don't use a gun or hang with someone who might.https://twitter.com/ChaseMadar/status/1002588377231872000 …
The only empirical investigation into whether felony murder rule (similar in character to gun enhancements in charges and sentencing) shows that the extra harshness has no deterrent effect on behavior http://www.nytimes.com/packages/pdf/national/malani.pdf …