Smartphone users oblivious to gunman who killed student on train

SAN FRANCISCO: When a California college student was shot dead by a stranger on a crowded commuter train in San Francisco last month, none of the dozens of passengers on board saw it coming — they were too absorbed in their mobile devices, officials said on Wednesday. 

Surveillance footage of the incident last month showed a train car full of passengers within feet of the accused gunman as he openly brandished a weapon on the train, they said.