According to [U.S.] Government (!) statistics, of the 30,000 gun deaths a year, 2/3 are suicides.
Some people apparently just need killin'. :-B
My guess is that a substantial number of the rest are police shootings.
In a related note, I saw that as of 2015, the police have seized more money from civilians, without a trial or being accused of a crime, than money stolen by "criminals". Literally, they stop cars going down the road and ask if they are carrying large amounts of cash - then just take it.
The money is split up among police agencies to cover "costs".
In case anyone wonders, it is nearly impossible to recover this money.