Tonight on Dateline. I dropped to my knees. I screamed. I couldn't believe it. My friend is dead.

Casey is dead.

He's something like that. He said for my wife. A woman has been found in a condo, there had been found in a condo.

There had been a gunshot and the gentleman who found her is her husband John.

It was like a punch in the gut.

Did we miss something?

And if we did, would Casey still be alive?

Now we have three victims.

Three women are dead, and you could be next. I was petrified.

It was so unbelievable that there is that kind of evil out there.

You both decided that you were going to record a conversation.

I wired her up.

The secret wiretap thing, good grief.

What was the strategy getting to talk?

I told the police everything.

What do you want to know from?

Crying out loud, there's something damn suspicious.

I looked right at him and I thought, oh, this is on.

Three women dead in a triple murder mystery.

Could an undercover sting help catch the killer?

I'm Lester Holt and this is Dateline.

Here's Andrea Canning with deadly omission.

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