Deborah Roberts

Based upon everything that I've learned, it was very important.

It kept him losing the weight, steaming forward, better improving his life.

But that newer, thinner, more athletic version, Brian 2.0, if you will, also masked a deeper, much more troubling turn in his life.

We know from our investigation into him and we had looked at his past and we know that he had some struggles with drug use earlier in his life.

According to police reports that were reviewed by ABC News, in February of 2014, Brian Koberger had recently exited a rehab center and rejoined his family.

And while he's home from rehab, Brian took his sister's iPhone

He called me to come pick him up and he wanted to sell a phone.

In July of 2023, I spoke with a former classmate of Koberger's and he says he was unwittingly roped in to help Koberger.

At his request, we're only using his first name.

So you're saying that you were leaving a party and he called you.

There's documents that ABC, myself included, have seen that show he stole his sister's phone.

So you thought he was trying to sell his own phone?

And at this time, did you know he had just gotten out of rehab?

Why do you think he was trying to sell that phone?

That was the goal for sure.

Those same police reports, again reviewed by ABC News, confirm that Coburger was charged with misdemeanor theft, but local officials told us that he didn't serve any jail time.

And what about the family dynamics at that time?

I think the family supported him throughout the entire process.

His family would say that they believed him to be sober ever since high school.

When he graduated high school, I think he actually got a security job right out of high school working for Pleasant Valley School District.