I don't see how anyone could miss someone waving a gun around even if you were using your phone at the time. People need to be aware of whats going on around them it could save your life. If someone had gotten their head out of their butt for 5 seconds and called police a man might still be alive.San Francisco police allege that on September 23, Nikhom Thephakaysone shot and killed college student Justin Valdez while they were getting off the train.
The randomness of the alleged murder is made more troubling, according to investigators, because of video evidence that demonstrates that although Thephakaysone openly brandished his .45-caliber pistol, commuters were too engrossed in their smartphones to notice.
San Francisco train gunman fails to attract attention of ‘overly engrossed’ smartphone users | The Raw Story