Where is George Zimmerman?

(CBS News) The attorney representing the parents of slain teen Travyon Martin said Tuesday he's worried that no one knows the whereabouts of the shooter, George Zimmerman.

New info expected in Trayvon Martin case

"We're concerned that he might be a flight risk, that nobody knows where he's at," said Ben Crump. "That he can get in contact with you, but you can't get in contact with him."

Zimmerman says he shot Martin in self-defense after following the teenager in a gated community in Sanford, Fla., on Feb. 26. He said after he followed Martin for a time, he was returning to his truck when the teen attacked him. He shot the unarmed teen to death during the altercation.

Tuesday, Zimmerman's now-former lawyers Craig Sonner and Hal Uhrig announced they no longer represent him and they don't have contact with him. They said they believe Zimmerman is in the U.S., but not in Florida.

Knowledge of Zimmerman's whereabouts may be instrumental in deciding what happens next in this case, according to CBS News senior correspondent John Miller.

"The lawyers told us yesterday, appropriately or otherwise, that they think he's out of state, which means Florida authorities can't pick him up," Miller said Wednesday on "CBS This Morning." "They have to get local authorities there and maybe go for extradition."

So does law enforcement know where Zimmerman is?

Sanford police has said they were in contact with him, "which is different from, 'we know where he is,'" Miller said. "So, it's entirely uncertain, to me, whether they actually do know where he is. That's going to be a factor here."

CBS News legal analyst Jack Ford also weighed in on what he called a case that's getting "curiouser and curiouser." Watch Miller and Ford's "CTM" analysis in the video above.