Previously on Season 4 of Frozen Truth, a young mother and her son disappear seemingly into the raging Missouri River at Bismarck, North Dakota, on a Saturday night in November 1996.

Sandra Jacobson had taken her youngest son to her parents' house for the evening, but it had taken them much longer than the 45 minutes from

their home in Center, North Dakota, to arrive at the child's grandparents in Bismarck.

And along the way, we've learned from the lead detective on her case at the time that Sandra Jacobson

called the Bismarck Police Department. According to the detective, Sandra was reporting some kind of occult activity in Center.

When Sandra and 5-year-old John finally did arrive at her parents,

Sandra seemed to be in somewhat of a frantic state, according to accounts from her parents,

who are now both deceased.

Sandra insisted that before the visit continued, she needed to go

get gas for her vehicle. Her parents reluctantly allowed her to go, but only if Sandra agreed that

they could take her to a doctor immediately afterwards. Sandra's car was found the next morning on the

banks of the Missouri, and there has not been a confirmed sighting of either mother or young son since.

They remain missing, and their case is still unresolved.

This is Frozen Truth, Season 4, Episode 4.

I'm Scott Fuller.

Thank you. I'm Scott Fuller. We've introduced some aspects of Sandra that will be hard for many of us to relate to.

One of my jobs in this season is to mitigate some of that by bringing you as complete an understanding of Sandra Jacobson as is possible now. Following

episode three, I received emails from numerous mental health experts and people who otherwise

work in the field, who were very intrigued by Sandra's medical history, as am I.

Some of that information may be impossible for us to acquire, especially now.

But at the very least, my job is to give the tools that we need for empathy, for perhaps

a troubled person in Sandra that we may not otherwise have.

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