It was, I don't know if I'd call it heartbreaking or just so disappointing.

They played a part and killing this kid and they're just like can we go home now.

But whenever they ask you you tell the truth and nothing but the truth.

You understand me because the only way this detective can help us if you say the fucking truth.

Because we didn't pull the trigger.

You understand me?

It is really shocking.

Really heartbreaking to go from little neighborhood skirmishes and neighborhood fights to premeditated murder. I'm Scott Weinberger, investigative journalist and former deputy sheriff.

I'm Anaseika Nicholazzi, former New York City homicide prosecutor and host of investigation discoveries true conviction.

And this is anatomy of murder. teenage years are often marked by falling in love for the first time, feeling the first

taste of real freedom, and starting to figure out what kind of person you want to be in the world.

There can also be a lot of drama in this phase,

relationships forming and ending, boundaries being pushed and tested.

Some of those friendships can last a lifetime, while others may have a much darker path.

Which brings us to the story of 15-year-old Seth Tyler Jackson from Marion County in Central Florida.

Captain Brian Spivey of the Marion County Sheriff's Office knows Seth Story Well.

Brian is currently in his 28th year of law enforcement, and there's one thing in particular

that has driven him over the years.

I love seeking justice.

Whether somebody had something stolen from them or whether they were just a weaker person that got beat up by a bully or a homicide case.

I love seeking justice and there's no case that's too small. I try to put myself in a victim's shoes and say,

hey, if my hard-earned money worked for this item and it was stolen, I would want it back. I would want to find who did this.

...