Federal judge Esther Salas' son is gunned down by a man delivering a package. 2,800 miles away, an eerily similar crime this time the target is distinguished lawyer Marc Angelucci. Who is behind the killings? Tracy Smith investigates.

For nearly 45 years, the murder of 11-year-old Linda O'Keefe continues to haunt California's Newport Beach Police Department; new technology and social media can turn the tide and help track down her killer; Tracy Smith investigates the cold case.

Successful tech-executive-turned-cannabis-entrepreneur Tushar Atre was found stabbed and shot on his cannabis farm in the Santa Cruz mountains; Tracy Smith investigates his kidnapping and murder and follows the trail that led to four suspects.