We have to be interrogated Tuesday for more than six hours.

Something finally said to me, look, it's time to come clean. I've had enough of this.

Now, whatever happens to me happens to me. But I had to admit that I was there.

I saw what I saw and I knew what I knew.

This is a scar that I'm going to live with for the rest of my life.

I'm Scott Weinberger, Investigator of Journalists and Former Deputy Sheriff.

I'm Anna Sige-Nikolazi, Former New York City Homicide Prosecutor and Host of Investigation Discovery's Truconviction.

And this is Anatomy of Murder.

For today's case, we're joined by a former colleague of mine from my law enforcement agent South Florida, Phil Ambebiel,

a veteran homicide detective who supervised what was a very busy unit back in the 80s and 90s.

And as you'll learn, this is a case that I stayed with him for decades.

And one that will likely have you asking how callous and cold-blooded someone could be.

South Florida and the Four Waterdale areas known as the Venice of America,

because of all its waterways and canals. And many of these homes that are situated on canals

are deep water access canals, which we enter out into the Atlantic Ocean.

It is a beautiful city. It is a great place, also very well known for spring breakers.

And we are talking about the heyday really of South Florida, the early 80s.

And that is in part what drew Anita Lopez and her family there.

Anita was a good Cuban girl. She was a young woman in her 20s. She was also an aspiring model.

They were immigrants from Cuba. They had come to this country about 10 years before.

She lived at home. And she was working as a receptionist at a warehouse.

And that is how she met her soon to be husband, Michael Keene.

...