(KNZA)--A woman has been charged in the fentanyl-related death of a St. Joseph, Missouri man in July.

KQ2-TV reports 36-year-old Lynsey Chan, of King City, Missouri, was charged this week in Gentry County, MO Circuit Court with first-degree manslaughter, second-degree manslaughter and delivery of a controlled substance.

Chan is accused of giving 42-year-old Brandon Haynes fentanyl on July 28th.

A felony complaint in the case alleges Chan forced the victim to leave her residence and watched him through security footage, as he was showing signs of overdosing and failed to call for emergency assistance. The court document also said she advised others not to call for medical assistance.

Police found Haynes dead in the front yard of Chan's residence.

The Missouri State Highway Patrol Division of Drug and Crime Control conducted the death investigation at the request of local authorities.