writes "A security camera shows a man raised a .45-caliber pistol several times and pointed it across the aisle on a crowded San Francisco Muni train, but not one of the dozens of passengers looked up from their phones and tablets until the man fired a bullet into the back of a SF State student getting off the train. "These weren't concealed movements," said District Attorney George Gascón, "the gun is very clear. These people are in very close proximity with him, and nobody sees this. They're just so engrossed, texting and reading and whatnot. They're completely oblivious of their surroundings.""