The Murder of Quincy McDonald

The investigation began when McDonald arrived at the Androscoggin County Sheriff's Office in Auburn and reported a murder at her home in Sidney — a jurisdiction not served by that office. The Androscoggin County Sheriff's Office contacted Kennebec County deputies, who conducted the welfare check and discovered Quincy's body. Maine State Police took over the investigation, spending much of December 20 processing the scene at 2005 Summerhaven Road. A Marine Corps flag was hanging from the corner of the building. Evidence on the porch — cut hair and reddish-brown stains — suggested Quincy had been dragged from inside the house to the backyard.

The Maine Attorney General's office prosecuted the case. A notable element of the investigation was the decision to withhold Quincy's name from initial court filings — a practice the AG's office later acknowledged was a departure from prior policy, citing an evolving understanding of victim privacy. After the grand jury indictment named him, the AG's office said it had balanced privacy concerns for the living family members. Legal experts were divided on whether that approach was appropriate.

McDonald had worked as a registered nurse with an active license in Maine, and as a part-time lecturer in nursing at the University of Maine. No disciplinary actions appeared on her nursing board record. A forensic psychologist evaluated her over approximately five hours across two January 2025 interviews and concluded she suffers from delusional disorder. The psychologist estimated that 71 to 78 percent of people with delusional disorder who receive antipsychotic medications are eventually restored to competence, though the disorder is known to be difficult to treat. As of early 2026, all remaining court documents are sealed and no ruling or trial date has been publicly reported.