Erin Moriarty

I made sure they were both dead, and then I just kind of kept stabbing their dead bodies.

Daniel admitted to all of it.

I just kind of messed around with them.

The horrific details Daniel shared match crime scene reports and the autopsies.

But what he said afterwards was even more outrageous.

Special Agent Chris Campion never changed the tone of his voice during the hours-long interview.

He never reacted visibly to anything Daniel Marsh said to him.

But he later admitted to me that Daniel Marsh was the most dangerous suspect he had ever interviewed.

With everything out in the open, Daniel was then willing to walk the police through where they could find the rest of the evidence.

The ski mask he wore, his gloves, his pants.

He had stashed it all in his mother's garage, but he kept the jacket.

Daniel knew his admission of guilt was going to lead to an arrest and was curious about what would come next.

There was one moment from Campion's interview with Daniel that especially shocked me.

In my years of reporting on crime, I had never heard anything like it in a police interrogation.

For the prosecutors building a case against Daniel, it was just one more example of how dangerous Daniel would be if he wasn't put behind bars for a long time.

That's next time on 15 Inside the Daniel Marsh Murders.

This series was reported by me, Erin Moriarty.

Alan Peng is our producer.

Maura Walls is our story editor.

And Jamie Benson is the senior producer.