Season 29 begins with an investigation into the 2016 murder of 13-year-old Nicole Lovell in Virginia. She was allegedly killed after meeting a stranger online. Also: a father recounts how his teen daughter was planning to run away with an older man she met online.

An investigation into the 1996 murder of a Texas widow that inspired the Jack Black movie "Bernie." At the heart of the probe is whether a mortician killed her and froze her body in order to live off her millions or to end years of abuse.

The 2010 murder of Julie Kibuishi is investigated in California. Police initially believed her killer was on the run until the probe took a different direction and focused on an up-and-coming actor in a local community theater.

A Texas woman is charged with killing her husband by knocking him off his motorcycle with her SUV while chasing his mistress, who was driving another SUV owned by the couple.

The 2011 disappearance of Shelley Mook in Bedford County, Tennessee, is investigated. Her ex-husband, Tyler Mook, is the chief person of interest in the case.

Alleged serial killer Todd Kohlhepp is the focus. A woman, Kala Brown, was discovered chained inside a shipping container on his Woodruff, S.C., property. Kohlhepp is suspected in the murders of seven people.

A Michigan teen recalls being doused with gasoline by her ex-boyfriend who set her bedroom on fire in a murder-suicide attempt.

A report on the search for a serial rapist.

Basketball star-turned-tech entrepreneur Sebastien Bellin discusses his eight-month journey of recovery after being nearly killed in the March 2016 terrorist attacks in Brussels.