Las Vegas Shooting: At a Loss on Motive, F.B.I. Turns to Billboards for Leads<br />LAS VEGAS — Still unable to identify a motive five days after the massacre of 58 concertgoers, local<br />and federal officials sounded increasingly desperate for leads on Friday, announcing plans to erect billboards with the message, “If you know something, say something.”<br />“There are still a number of people out there that know<br />that something looked out of place,” said Undersheriff Kevin McMahill of the Las Vegas Metropolitan Police Department.<br />In speeches at Police Memorial park in northwest Las Vegas, friends<br />and fellow officers recalled calling him Charlie, Coach Chucky or even, occasionally, “Captain America.”<br />“I know that none of us here really planned on saying goodbye to Charlie so soon,<br />but I’m glad we get to send him off in our way, not somebody else’s way,” said Steve Grammas, the president of the Las Vegas Police Protective Association.<br />office in Las Vegas, said billboards would be set up around Las Vegas area, to<br />“reach as many people as we possibly can,” seeking tips about the gunman.