( CNN ) -- A 59-year-old Michigan woman has been charged in connection with the death and dismemberment of the woman 's 32-year-old son , a sheriff said Monday . Donna Scrivo was arraigned in St. Clair Shores , Michigan , on charges of disinterment and mutilation of a body , St. Clair County Sheriff Tim Donnellon said at a news conference . Body parts identified as those of Ramsay Scrivo , the suspect 's son , were found in garbage bags dumped along Michigan roads , according to law enforcement officials . Officials at the press conference said they expect more charges to follow . An autopsy is not complete and a cause of death has not yet been determined , Detective Sergeant Jay Cohoe said at the news conference . According to court documents , Donna Scrivo filed a petition seeking hospitalization for mental illness of her son in May and was granted guardianship . The petition was filed shortly after Ramsay Scrivo 's father 's death , Cohoe said . `` From what I understand , it ( the father 's death ) did have a negative impact on the family , '' Cohoe said . Officials stated that there was no history of assault allegations between Donna Scrivo and her son but police had been to the home on disorderly complaints . The body parts were found Thursday and Friday at five different locations in St. Clair County , a few miles from the Canadian border . A witness told police she saw a middle-aged woman in a light-colored SUV dumping what she initially thought was garbage in the area . Security camera footage from the area confirmed the witness ' account . `` A suspect vehicle was identified and images broadcast of a person of interest , '' the St. Clair Shores police and the St. Clair County Sheriff 's Office said in a joint news release Saturday . Ramsay Scrivo had been missing since January 26 . His remains were identified through fingerprints . `` He would sit outside , very friendly , '' a neighbor told CNN affiliate WDIV . `` Well-respected , everyone talked to him . He would say hi to everybody . '' Donna Scrivo was being held with bail set at $ 100,000 , and with a preliminary hearing set for February 14 , according to officials at the news conference . She had not obtained an attorney as of Monday afternoon , officials said . CNN 's Joe Sutton and Rick Martin contributed to this report .
Body parts were discovered last week in garbage bags along roads in a Michgan County . Authorities say the remains are those of a 32-year-old Michigan man . The dead man 's 59-year-old mother was charged Monday in connection with the death .