Autopsy unable to determine cause of death in case of Lizzie Mae Collier-Sweet

BROWNTOWN TOWNSHIP, Mich. (WXYZ) - Officials say an autopsy has been unable to determine the cause of death of a Brownstown Township women whose body was found six years after she vanished.

Lizzie Mae Collier-Sweet disappeared in January 2007. The 49-year-old was last seen shortly before her home burst into flames.

Her skeletal remains were found in February by a man walking through a field. Officials have said she was found in a shallow grave. 

Collier-Sweet's husband, Roger Sweet, is currently in prison. He is serving time for sexually assaulting a mentally disabled woman and the 1990 killing of his first wife, Marlene.

Police say they have long suspected him in the disappearance of Lizzie Mae Collier-Sweet. However, he has never been charged as part of the case.

Marlene Sweet's death was originally ruled accidental, but the case was reopened after Lizzie Mae Collier-Sweet disappeared.

Roger Sweet then pleaded No Contest to Second Degree Murder. The 65-year-old's first chance at parole will come in May of 2016.

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