MacDonalds pregnant wife and two daughters had been repeatedly clubbed and stabbed to death.

Jeffrey MacDonald, still alive today, continues to maintain his innocence.

So I didnt ask for an interview, a phone call, anything.

Investigation Discovery

Credit: David Strongman/Investigation Discovery

This movie is based on a book.

In McGinniss book, MacDonald is described as a narcissistic sociopath.

Is that how you were playing him?To the best of my ability.

Do you think hes innocent?I dont know, but I still have questions.

Look, he spent 40 years in prison.

This is the longest-running criminal case in United States history, but there are a lot of questions.

It could have been a plant.

Just because they said it doesnt mean its true.

They say he did it.

But he never said he did it.

He never said he was obsessed with it.

Weirdly, this case took nine years until MacDonald ultimately went to trial…Its crazy.

This is not a man who, in my opinion, was a serial killer.

He didnt kill his family and then go out and keep killing.

Unless he was just a very convincing sociopath.Thats the thing.

Christ, maybe it was just nine years of a really good cover.

A beautiful work by a fing nutbag sociopath.

Final Visionpremieres on Investigation Discovery (ID) Sunday at 8 p.m.