An urgent manhunt in Ohio. A widow stands trial a third time. Plus, a deep dive on arson investigations.

In Ohio, police share security camera video of a person of interest in the shooting deaths of a dentist and his wife. In Georgia, a widow accused of killing her husband stands trial for the third time. In Los Angeles, an update in the Nick Reiner case. Plus, an arson investigator on what tools he uses to solve a crime.