he was there with bob mcclancy when he died by admission. hat took photographs of mr. mcclancy and manipulated the scene of the death, whether it was a crime scene or not. >> but the battle of the con artists was just getting started. and the prosecutors believed they had a strong case. >> what was the most important piece of evidence in your view? >> the most important piece of evidence, of course, was the confession taken for chuck kaczmarczyk. >> and what a dark and devious story of murder chuck was about to tell. coming up -- >> keep it simple. make it look as natural as possible. >> powerful testimony from the star witness. and from a reluctant son. >> she looked at me as if she wished i was dead. >> when "dateline" continues. robinhood believes now is the time to do money. without the commission fees. so, you can start investing today wherever you are - even hanging with your dog. so, what are you waiting for? download now and get your first stock on us. robinhood. the team's been working around the clock.wire, we've had to rethink our