These murders, they affect people years later.

And so, you know, I've had someone say,

why put all that time and energy into a cold case?

The guy's dead, who cares, kind of thing.

But it's rewarding to be able to tell these victims and these family members like,

hey, we got them because they don't have any other way to have peace.

These cases, they affect people for a long time.

And so being able to let them have peace is a big deal like in this life.

I'm Scott Weinberger, investigative journalist and former deputy sheriff.

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

And this is anatomy of murder.

In the year 1956, Dwight Eisenhower was president. Segregation on public buses was outlawed,

and Elvis Presley's song Heartbreak Hotel top the charts.

Also during that year, in a quiet neighborhood

on the outskirts of Los Angeles,

an 18-year-old girl named Barbara Jean Jepson

was murdered in her home.

At the time, investigations relied mostly on the age-old methods of police work, knocking on doors and examining the evidence.

Forensically, the best an investigator could hope for was fingerprints.

But those methods had not provided answers in the search for Barbara's killer.

Over the course of the next 50 years the case passed

through the hands of countless seasoned detectives and yet it remained

...