That's what he was trying to do, was protect his family.

That's all he ever wanted to do.

Even when the man was dying, that's what he was doing.

A quiet family night at home, shattered by intruders.

The gun was like right here.

A devoted father and husband, dead.

She just kept saying they killed him.

Someone murdered her husband, but left her alive.

And that left police suspicious.

Was it possible she was involved in her husband's murder?

The indicators are, in cases like this, that it's dispelz not a random act.

But why would she kill a man she obviously loved?

They never thought they always were very happy.

This was a family affair, all right.

But it was another family that was keeping secrets.

You were seeing anything like that before?

No.

One father who fought to save his son, another who used his son to save himself.

He's a monster.

Tonight, a mystery that changed two families forever.

Here's Josh Mangles.

What would you do for your family?

...