Well, we have had our own share of these shoot-outs.
A few years ago a girl went to a local shooting club and instead of shooting the targets she shot a few fellow shooters. She was caught alive and I think she was put to mental hospital.
A few decades ago a farmer shot 4 or 5 police men who were on the way to arrest him for some minor misconduct.
Also a couple of years ago a young man exploded a bomb in a market killing himself and few other people.
This particular young guy had been bullied at school for some time (as was the bomber guy) so that may shed some light to his strange ponderings.
When I had my licences i had to consult my local police superior face to face for every one of them and i though the system was pretty good and from those times I think the system has become more strict but I guess it does not work too well in some areas...
-C+