Government funds university professors to do "research" on gun issue guarantees biased results. We all know professors in social "science" are 99% liberals and they are proud to advocate "studies" against the 2nd Amendment.
Again and again, liberals show they are eager to cherry-picking numbers to produce whatever statistics.
One exception is John Lott, who started by taking an project of gun control. He was asked to prove guns increase crimes. After the study is done, he reached a complete opposite conclusion and published his book "More guns, less crime".