Erin Moriarty

Also present at the scene was then Worcester District Attorney John Conte.

The state police are working around the clock on this, okay?

Detectives zeroed in on everyone who was close to Molly, including family members, friends, and Molly's boyfriend, Steven Lucas.

They'd only been dating for three months and had just gone to the prom together.

Former WBZ investigative reporter Kathy Curran.

The Bishes never believed that Stephen was involved.

Within 24 hours, authorities were looking at known sex offenders in the area.

We've looked at 35 to 45 sex offenders in the area.

That's been the scariest part about all this, is realizing how many bad people were within the fabric of our community.

Molly's dad worked tirelessly with police.

He was always going every weekend, trying to work with the police and trying to find different ways to find Molly.

And despite the fact that DNA testing was still in its early stages back in 2000, Detective Richard says they did collect and document many items found in and around the pond area, including discarded cigarettes and trash.

As the days went by, the Bish's despair grew.

It wasn't like Molly was hit by a car or got sick.

She was just suddenly gone.

And we didn't know where she was.

But it would be Maggie Bish who would give detectives their biggest lead.

We pulled into the parking lot here.

The morning before Molly disappeared, as Maggie went to drop Molly off at work at Cummins Pond,

She recalled seeing a man sitting alone in a white car that resembled this one.