About two months after his parents were killed, Mark Sheridan needed to file their taxes.

I asked the Somerset County Prosecutors Office for all of the materials that they had taken

from the house copies of whatever they had.

And what they gave Mark surprised him.

It was enough to fill a banker's box.

When I got back to the files from the Somerset County Prosecutors Office,

all of the L3 documents were there.

L3. It's an office complex on the Campton Waterfront.

The documents were all about the sale of those buildings.

And I'm trying to get my arms around it.

And I start to see from those emails that there was a fight over this issue, over this property.

Mark knew about this because his father had asked him for legal advice about it five months before his death.

His dad was upset about the issue back then.

But the banker's box had more documents and details that Mark hadn't seen.

They'd taken everything on the dining room table, essentially.

And so when I started looking through all of that, I was stunned to see those documents out and about in September of 2014.

But there the documents were.

On the dining room table, the night his parents were killed.

Mark had discussed this real estate deal with his father.

He knew how stressed he'd been about it months before.

And I know that this is what my father was upset about.

There were handwritten notes about phone calls and meetings, email exchanges that were printed out, and everything was stated.

...