Jury selection begins in Las Vegas for Duane "Keffe D" Davis as prosecutors attempt to prove his involvement in Tupac Shakur's murder using his own incriminating public statements. 22-year-old North Dakota mother attacks her three young children with a knife, her 1-year-old the only survivor. Two Florida men face off with a machete and hatchet in a parking lot duel over a shared love interest. Sydney Silvagni reports.