Prison guards searched the death row cell of Polly Klaas' killer after learning he may have corresponded with the suspect in the decade-old slaying of JonBenet Ramsey, authorities said Friday. Guards at San Quentin State Prison searched Richard Allen Davis' cell Thursday, but not would immediately disclose what they found. A news conference was planned later Friday. Davis, 52, was sentenced to death for the 1993 kidnapping and murder of 12-year-old Polly Klaas. The girl was from Petaluma, where suspect John Mark Karr lived from 2000 to 2001, when Karr was charged with child pornography. Lt. Eric Messick said officials...