Sierra Barter’s step-grandfather had terrorized her family for years before his death in 2008. Jim Mordecai sexually abused the women in his life, including his step-daughter and his high school students. But he also seemed to have knowledge about a string of 1970s unsolved murders involving hitchhikers near his Northern California hometown. Sierra launches an investigation into Jim’s life which draws her closer to estranged relatives, but what she learns of her dead step-grandfather fits the profile of a man who could be responsible for some of the most infamous killings in the Bay Area.

The Max Original “The Truth About Jim” follows Sierra’s journey to learn about Mordecai’s past, his victims, and his penchant for violence. Was this serial sexual offender also responsible for the Santa Anna Hitchhiker Murders? Or even more shocking…could he have been the Zodiac Killer?

OUR SPOILER-FREE REVIEWS OF "THE TRUTH ABOUT JIM" BEGIN IN THE FINAL 12 MINUTES OF THE EPISODE.

In Crime of the Week: frankly disappointing.