Champagne and Elise Garcia, then 21, barricaded themselves in the home with his 5-year-old son at 3823 N. 14th Place and Champagne and shot at a SWAT team as they forced their way in. The boy was released before the shooting.
According to court records, Champagne pleaded no contest to a second-degree murder charge in April 1992. He was released from prison in June 2005.
After the standoff a year ago, Champagne faced charges of first-degree attempted murder, kidnapping, aggravated assault and misconduct involving a weapon.
County records show the house was previously owned by Clarence Champagne, but it went into foreclosure and was sold at public auction in May 2011
Police were notified about the discovery at 1:45 p.m. Tuesday, according to police spokesman Sgt. Tommy Thompson.
Detectives from the Violent Crimes Bureau of the Phoenix Police Department are also assisting in the removal of the remains in the area near 16th Street and Indian School Road.
News helicopter pictures showed several police personnel digging in a shallow grave.
Police were at the home overnight collecting evidence.
Stay with cbs5az.com and CBS 5 News as this story develops.
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