20/20 Season 49 Episode 3 The Hunt for Mr. Right

When 52-year-old American University accounting professor Sue Marcum was found dead at the bottom of the stairs inside her upscale Bethesda, Maryland, home in 2010, her murder made headlines. Medical examiners ruled her death a homicide caused by blunt-force trauma and asphyxiation. DNA evidence found underneath her fingernails signaled a possible struggle with an attacker. But what initially appeared to be a burglary gone wrong soon took a darker turn when authorities focused on former boyfriend Jorge Rueda Landeros, a self-described financial guru who had lost large sums of money Marcum invested with him and who also stood to collect a $500,000 life insurance policy in her name.

Landeros disappeared to Juarez, Mexico, and eventually to Guadalajara, where he assumed a new identity, living as a yoga teacher and poet until he was captured and extradited to the United States. Last October, Landeros stood trial for Marcum's murder, and a jury verdict sealed his fate.