Some of the remains belonged to Alan Champagne's mother.
PHOENIX (AP) _ An ex-con who served prison time for second-degree murder now has been accused in a double homicide case in Phoenix.
Police say human remains were found at the former home of Alan Matthew Champagne's mother.
Police were called Tuesday after landscapers doing work for the home's new owners discovered body parts inside a buried box in the backyard.
Police say the victims are believed to be a man and a woman killed in a north Phoenix apartment in 2011.
Their identities are being withheld pending an autopsy.
Police say the 42-year-old Champagne was jailed on unrelated aggravated assault and criminal trespassing charges.
He's now been re-booked on suspicion of two counts of first-degree murder.
Champagne served nearly 13 years in prison on the murder conviction before being released in 2005.