A decent article from NY Times (shocking!!): Gun Laws and Crime - A Complex Relationship - NYTimes.com

In other words, strict gun laws have not been shown to do what it intends to do.

ABC 20/20 article: Gun Control Isn't Crime Control - ABC News

Note, these two articles are not from NRA or pro-gun sites! They are from traditionally liberal sites!

Long article: https://www.ncjrs.gov/pdffiles1/nij/grants/194051.pdf

But, at least, from reading it, it seems like enforcement of existing regulations is what is needed, rather than more laws/regulations. And yes, criminal background check do work if done right (aka enough staffing, etc.).

Unfortunately, nothing will prevent a guy with psychiatric issues from snapping. Liberals are equally ignorant to think that it is possible via gun control.