Transcript for 'Murder for Hire': Going Undercover
You'll just never believe how many hit men are being hired across America. -- husbands and wives even -- co workers how do we know sooner you can kill him. The better yes well right along shotgun with deep in new York and they hit man hired to pull. -- -- assassins are really undercover agents disguised as killers who -- you sit down with 20/20 how many -- disguise it. And the people who hire them what they think they're getting what they paid for -- spouses -- -- what they're really getting. Friday David -- murder for hire an exclusive only 21 for -- -- --
This transcript has been automatically generated and may not be 100% accurate.