You have to go to
www.msnbc.com to see the story. They stopped a van that was making a call at a payphone. Yesterday's newsconference asked the sniper to call a number. Then Chief Moose gave another cryptic newsconference this morning saying that the van driver definitely called the number but again told the sniper that the police were preparing a "response" to the message.
I think they might have caught someone related, potentially part of a small group or couple involved in it.