LAS VEGAS (AP) - Tourists coming to Las Vegas may soon encounter something darker than the dazzling lights that typically welcome them to the city.
Billboards will serve as a stark reminder that investigators remain stumped about what drove a gunman to mow down concertgoers from a perch in a high-rise casino hotel last Sunday.
Police who have yet to find Stephen Paddock's motive for the massacre said Friday that they will enlist the public's help.
The FBI's Aaron Rouse says billboards will ask people with credible information to call the agency. The number will be 800-CALL-FBI.
Paddock left behind little clues about what led him to carry out the deadliest mass shooting in modern U.S. history. He killed 58 and wounded nearly 500 before killing himself.