Diane Schuler

On July 26, 2009, Diane Schuler, a 36-year-old mother of two, drove her minivan the wrong way for nearly two miles on New York's Taconic State Parkway, resulting in a horrific crash that killed eight people, including herself, her daughter, and her three young nieces. To the outside world, Diane was a loving wife and a "supermom"—organized, responsible, and completely devoted to her family.

But toxicology reports revealed a shocking secret: at the time of the crash, Diane had a blood-alcohol level more than twice the legal limit and high levels of THC in her system. Her husband and family have vehemently denied that she had a drinking problem, insisting that a medical issue, like a stroke or a painful toothache, must have caused her to become disoriented.

Was this a tragic, unexplainable medical event, or was the perfect mom persona hiding a devastating secret of addiction? This episode dives deep into the timeline of that fateful day, the conflicting witness accounts, the controversial HBO documentary "There's Something Wrong with Aunt Diane," and the theories that still divide public opinion.