We need to know how they define their "gun violence death rate." I'm sure it's not based just on mass shootings. So my guess is that it includes murders (of all kinds), gang shoot-outs, suicides, and police officer-involved-shootings. As far as I'm concerned, that's a bogus statistic. Yes, it's unfortunate when anyone commits suicide, but my daughter has made eight or nine conformed attempts and none of them involved a firearm. I knew a guy who committed suicide by parking his truck on an Amtrak main line. People who want to kill themselves will find a way to do it, so I discount suicides from "gun violence" statistics off the top.
I also discount officer-involved-shootings. Yes, they are violent and yes they involve firearms -- but they are not the sort of "gun violence" law abiding citizens need to concern themselves with. Our state police are -- in general -- a bunch of jackbooted thugs, and so are several municipal departments in the state, but I haven't seen or heard any reports (credible or not) of anyone being shot to death for running a red light in this state.