For the most part, the beginning of the month of February in 2001 was just like any other for the residents of Chesterfield, New Hampshire.

The occupants of the small town were huddled together for the winter,

continuing to face temperatures below freezing and roads covered in the sparkling crystals of the region's

annual snowfall. But the calm the State Troopers. The worrying sound of helicopter blades above the small town

drew eyes to the sky, while foot searches on the ground and of the nearby

Connecticut River and Vernon Dam hoped to turn up any small clue of the mother and

daughter gone missing. Tina and Bethany Sinclair were nowhere to be found.

Though the two missing Sinclair's were the focus nowhere to be found.

Though the two missing Sinclair's were the focus of the small community that year, over time

updates became fewer and farther between.

Eventually, the signature cold weather of New England struck again,

making the searches of the waterways surrounding the town next to impossible.

The search is paused. The investigation stalled out. But Tina and Bethany Sinclair are far from forgotten. Although Tina and Bethany have not been seen for more than 20 years, the case is not closed.

Answers are out there.

I'm Kylie Lowe and this is the case of Tina and Bethany Sinclair on Dark Down East. Chesterfield, New Hampshire is a small family-oriented town of just 3,500 people.

It lies at the southeastern most point of New Hampshire,

bordering both Vermont and Massachusetts,

on the ancestral lands of the Penacook people.

According to census records, the majority of the square mileage of the town is just water.

The layout of the town leaves just a few square miles for the citizens of Chesterfield to make their homes,

and the few thousand people live in close proximity to one another.

Like much of New England, Chesterfield is the kind of place

...