The detectives asked him, like, you know, did he approach you in a threatening manner?

Was he mean to you?

Was he aggressive?

And he said, no, he was a really nice guy.

We said hello.

And then he just shot him.

They asked him how many times, and he makes the sounds, he makes the three pow-pou-pou sounds in the interview.

It's really eerie.

I'm Scott Weinberger, Investigator Journalist and former deputy sheriff.

I'm Anna Sega Nikolazi, former New York City homicide prosecutor and host of investigation

discoveries true conviction. And this is Anatomy of murder.

Some of the hardest murders to solve are the ones that seem to occur without explanation,

the ones that don't come with a clear motive or any immediate suspects.

Then there are those crimes where interviews, forensics, just everything seems to fall into place.

But even some of those still remain hard to understand, even after they're unraveled.

Today's case begins in a quiet residential neighborhood on the south side of Dallas, Texas.

It was a warm Sunday night in early August of 2020 when suddenly the sound of gunfire rang out.

Hearing that unmistakable noise, a neighbor stepped out of his home to see what was going on.

And what he saw next stopped him cold, a man lying in the street.

He wasn't moving.

He doesn't know who it is.

He can tell that the victims got a gunshot wound to the head,

...