DNA at heart of Arizona trial. Aspiring model's killer fights to clear his name. Plus, Relisha Rudd.

Thirty-one-year-old Allison Feldman was found dead in her Scottsdale, Arizona home in 2015. Ten years later, after a slew of delays over DNA, a man is finally on trial for her murder. In Illinois, a man and his parents were convicted of murdering his ex-wife in the ‘90s. He says new DNA evidence…