Bill Callaham, a California lawyer, never had a chance to hand over his Rolex, cell phone or hundreds of dollars in cash. The men who attacked him from behind in the Central Business District never made any demands. They beat him unconscious, breaking his nose and his jaw. And afterward, he said, they took nothing. "If somebody had confronted me and asked for money, I would've happily given them my money," Callaham said Friday, a week after the assault. "I don't know if it was random, I mean, I have no idea. I just think it's a sad state of...