What I find interesting is that the church felt it necessary to have security in the first place. I’m glad they did. Is that church located in a high crime area or did they receive threats, perhaps from the now dead shooter?
While I can't speak for the church, I know that due to heightened security measures (especially after the Seattle shootings last year) every synagogue in Kansas City has armed guards (off-duty police officers) and tight security (parking passes and "tickets") to get into High Holy Day services.
Mark