Thursday was a day of developments in the case of Nancy Guthrie, yet police say they still don't have a suspect.  Guthrie's son made another on-camera plea for kidnappers to contact them.  But police haven't' confirmed the credibility of any ransom note. Meanwhile, police arrested a California man, who's accused of trying to take advantage of the Guthrie family. See omnystudio.com/listener for privacy information.