I've been collecting the published reports of gun/holster safety incidents for some years now, and they tend to be Safariland related. Perhaps because that company dominates the LEO market? And uniformed officers' incidents are (a) likely to be reported and (b) likely to be litigated.
Let's start with a list, then show the print appearances:
PDF's of stories not from newspapers, but from news sites:
Then Safariland has its own set of "We Warn You About Our Holsters":
Read more in my book titled "Holstory -- Gunleather of the Twentieth Century -- the Second Edition" that is available at www.holstory.com and printed for you/shipped to you in USA.