Nancy Grace

Police even find two plastic baggies in the home, one containing cocaine with Willis' DNA and another with fentanyl and Carson's DNA.

Video was shown in court, Willis sitting in the back of a police car, telling his version of the night before.

He went on to insist he had no idea his friends died just steps away from him.

What more do we know?

This is what Platt County Prosecutor Eric Zahn tells us.

According to prosecutors, the defendant provided it.

The friend, the friend, the scientist, the HIV researcher, Jordan Willis, age 39, the best friend, supplied a plate of Coke, possibly laced with fentanyl, to his friend's

You were just hearing from our friends at KMBC 9 News to Dr. Kendall Crowns joining us.

Dr. Kendall Crowns, I want to understand how the use of these drugs, potentially cocaine cut with fentanyl, don't know if they knew it was cut with fentanyl.

What that would look like.

I mean, it's hard for me to understand, although I've

Heard about it.

I prosecuted.

I've seen it at crime scenes where you have a party and there's a plate of cocaine out.

I mean, I would think there'd be sandwiches and chicken wings, right?

Celery, carrots, ranch dip.

There's a plate of cocaine and everybody's doing it.

You know, how many times have you heard that?

Mom, everybody's doing it.

How are people supposed to know that cocaine can be laced with fentanyl and what fentanyl can do with you?