$300K reward in Nancy Guthrie search; new DNA tech

The search for 84-year-old Nancy Guthrie enters a critical new phase as the reward for her safe return reaches $300,000. Following a major contribution from a Milwaukee-based donor, investigators in Tucson are pivoting to advanced genetic genealogy after initial DNA tests failed to yield a match in federal databases. We've got the latest on the evidence found two miles from her home and how private lab technology is building a profile of the masked suspect.