Witnesses told sheriff's investigators that the gunman opened fire on the two men around 3:30 p.m., then fled in a pickup truck belonging to one of the victims. The sheriff's department didn't get a call until around 6 p.m.
Keep in mind that (a) news accounts are often incorrect and (2) the word "witness" may be used in its broadest sense, as one who provides information. The speaker may not have been an eyewitness to the actual shooting. And then see (a) again.What was going on for 2.5 hours that witnesses to the shooting didn't summon help?
Can someone familiar with PTSD explain how this happens? I just don't understand how somebody "snaps" in such a way to shoot two supposed friends in the back?
PTSD may have nothing to do with it or may just be a longer term contributing factor. There may have been some sort of conflict, ongoing problems within the group. We don't know. Surprisingly, people turn and kill "friends" and family with some regularity without a lot of true notice that such might happen and do so without a contributing PTSD factor.