How four people with what I would describe as a moderate amount of training fared when put into a simulated active shooter situation. This is no faked up “test” where the good guys are set up to fail, nor are they set up to succeed either. Therefore the results are mixed. Well worth reading.
http://www.wfaa.com/news/local/investigates/ready-aim-truth-good-guys-vs-bad-guys-part-1/27672243