Juju Chang

But detectives still had to track Peter's movements that day after he left the house.

Did he stop anywhere?

Was he stopped?

Did he take certain freeways?

So that maybe we can get some videotape of Peter and Juan in the car so we can attempt to identify Juan.

In fact, investigators were able to track down footage of Peter's vehicle at a toll booth on the 73 freeway.

And judging by an analysis of that surveillance tape, it seems there's only one person in that car, and that's Peter Chadwick.

We're continuously asking Peter for follow-up questions.

And one of his answers is that he got stopped by the California Highway Patrol with Juan in the car.

A California Highway Patrol officer approached his car, because you can't stop there, and basically said, are you having a problem?

And he said, well, I pull over to make a phone call.

The officer remembered having that interaction with Peter, and he was certain that Peter Chadwick had been alone.

As we continued to look into who Peter was and who QC was, we quickly realized there was some turmoil in the marriage.

This was not the picture perfect family that everyone kind of thought it was from the outside.

QC wanted to grow and blossom into the person that she really was.

And I think Peter wasn't entirely supportive of that.

He teased her a lot, joked, ridiculed at times.

Did she give the indication that maybe their marriage was in trouble?

She indicated that she was wanting to be more independent and he wasn't very enthusiastic about that.

Did you get the indication that she was feeling afraid?