Gail and Pierre Vaughn say they have always maintained that their son, Chris Vaughn, who was convicted of murdering his wife and three kids in the back of their SUV, is innocent. Speaking out for the first time on television, the couple sat down with Dr. Phil to share their story on Monday and Tuesday’s episodes, "Murder in the Suburbs" and "Murder in the Suburbs: Inside the SUV."
 
Gail and Pierre say they never asked their son what happened that early morning of June 14, 2007, but that they finally learned from a letter he recently sent to them. In the letter, Chris claims it was his wife who shot and killed their kids before shooting him twice and then turning the gun on herself.
 

Private investigator Bill Clutter, who has been investigating the case for 14 years, says with this new information and after doing a reenactment in an SUV, he, too, claims Chris is innocent and deserves a new trial.
 
However, former Assistant State’s Attorney Chris Regis, who was a member of the prosecution team in Vaughn’s case, says Vaughn has had 10 years to come up with a story of what happened that tragic morning and that he is where he belongs, in jail.
 
But Chris says he doesn’t want a new trial. So what does he want? Hear what Gail and Pierre say is Chris’ wish in the video above.
 
This episode, "Murder in the Suburbs: Inside the SUV," airs Tuesday. Check local listings to see where you can watch.

WATCH: Prison Reform Activist And ‘Murder In Illinois’ Podcaster Claim Chris Vaughn Didn’t Get A Fair Trial

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