Don't Make New Laws On Guns, Enforce The Ones You Have

The basic story of what happened at the Holocaust Museum in Washington is at the New York Post today.  What happened there is horrible and should never have happened.  However, I have one question--this shooter was a convicted felon who had served time in jail, why was he allowed to own a gun?  I believe Americans have the right to own guns, but I do not believe convicted felons have the right to own guns.  We do not need tighter gun laws, we need common sense gun laws that are enforced.  I don't know whether this man owned a gun legally or illegally, but either way, it illustrates the fact the we are not adequately enforcing our current gun laws.