It wasn't unusual for months or even years to pass without contact between Marilyn Lehan and her family.

But when her brother decided to make a spontaneous trip to visit Marilyn's home in Maine one summer,

it set off alarm bells. The stories about her last known whereabouts don't make sense to her family, and at this point,

no one knows for sure the last time she was seen alive.

I'm Kylie Lowe, and this is the case of Marilyn Lehan on Dark Down East.

It was August 2012, and Pat Lehan had already put thousands of miles on his motorcycle as he crossed

the border into Maine.

He was on a long-haul international trip with a group of friends, starting in Colorado

and reaching as far east as Newfoundland, Canada,

before looping back west again. But as Pat turned on to Route 1 in Calais, Maine and ventured

South, he was solo. He'd split off from the larger group to pay his sister and her husband

a surprise visit. The last Pat heard from his younger sister, Marilyn Leighan, she was living in the town of Eastport,

about as down east as you can get.

Pat followed his map towards Clark Street and his sister's sprawling oceanfront property on Harris

Cove.

The house was set back from the road down a long gravel driveway.

The tires on Pat's motorcycle kicked up some dust as he coasted towards the shingled cottage.

He was looking forward to catching up with Marilyn.

It had been years since they last talked.

Pat rapped on the front door and waited.

A few moments passed and he knocked again, but no one answered.

Glancing back towards Clark Street, Pat decided to check in with the next door neighbors,

...