...and has been around for a long time, long before the so called '4 rules of firearms safety'. The importance of this rule is that the all the others often go completely disregarded once booze and/or drugs are mixed with gunpowder. I would be willing to bet dollars to donuts that booze, drugs or both were involved in this shooting:
Simply amazing how friggin stupid booze and drugs can make people, then again, some people need no help at all in that regard.
All the best,
The HMS Prince of Wales
1 hour ago