Just before Christmas, detectives from the Los Angeles County Sheriff's Department pried open a crate outside a warehouse to find something they had been chasing for months: an 840-pound Brazilian emerald that had been reported stolen.

Now, if they could just figure out who owns it. So far, at least five people have come forward to say it's theirs.

"It seems like the more we talk to people, the more people claim to have ownership over this thing," said Lt. Thomas Grubb, who heads the sheriff's investigative team on the case. "We haven't determined who's not a suspect, really."