How a bakery worker's secret plan to recover DNA from a discarded Coke can helped investigators solve the cold case of a college student murdered over Thanksgiving weekend. "48 Hours" correspondent Peter Van Sant reports.

Chacey Poynter, a Texas woman convicted in the 2016 murder of her husband, University Park Fire Department Captain Robert Poynter, tells her story for the first time about what happened the night he died, in an interview with Peter Van Sant.