Erin Moriarty

One witness, a member of the Davis Police Department, helped process the crime scene.

He testified that the bloodstain patterns left behind suggested that Chip and Claudia were awake,

and had tried to defend themselves against Daniel.

These were horrific details.

Prosecutors tried to prepare Claudia and Chip's families for what they would hear in the courtroom.

Claudia's daughter, Victoria, told me that one of the most painful times for her was sitting in court watching that taped interview between FBI Special Agent Chris Campion and Daniel Marsh.

Adding to Victoria's horror was the score of friends and fans, yes, fans, who showed up to the trial to support Daniel.

The prosecution was convinced that not only did Daniel know exactly what he was doing when he killed Chip and Claudia, but the big question at trial, was Daniel in his right mind?

Was he sane when committing the murders?

Daniel's defense team intended to prove he wasn't.

And this was the man they wanted to help make that case.

I sat down with Dr. Soulier in 2018 and again in 2025.

Soulier first met Daniel a few months after his arrest.

Daniel was still regularly thinking about killing people.

He told Soulier that he had thoughts of harming his peers and the people taking care of him in Juvenile Hall.

Then, just like FBI Special Agent Chris Campion, Dr. Soulier found himself on the receiving end of Daniel's homicidal thoughts.

It wasn't the only time that a patient had threatened Dr. Soulier.

So while he took it seriously, it didn't deter him from trying to speak with Daniel again.

He was able to go back a week later.

Dr. Soulier believed that Daniel's desire to kill him and others was actually the result of an obsessive-compulsive disorder.