There already is gun control! What you are asking (no killers get guns) you will never be able to achieve.. they are not law abiding on anything! And get some intelligence on these things!!
The right to bear arms is granted to us to protect us from a government out of control and likely to turn on good citizens.. and today... it looks more and more likely than it ever used to.
“The right to bear arms is granted to us to protect us from a government out of control and likely to turn on good citizens...”
NO! The right was NOT granted to us; the right was pre-existing. The Constitution GUARANTEES and PROTECTS that right.