Tanisha Anderson died as a result of being physically restrained in a prone position by Cleveland police on Nov. 13, the Cuyahoga County Medical Examiner's office announced Friday.
Her death was ruled a homicide.
Anderson's official cause of death was ruled "sudden death associated with physical restraint in a prone position," according to the medical examiner's office. Her heart disease and bipolar disorder were considered factors that increased her chance of sudden death, office spokesman Chris Harris said.
Anderson, a 37-year-old East High School graduate, has been held up by protestors as an example of police violence alongside Tamir Rice, Michael Brown and Eric Garner, among others.
Her family called police twice on Nov. 13 to report the 37-year-old woman was disturbing the peace, police said. They eventually agreed to let police take her to St. Vincent Charity Medical Center for a mental health evaluation.
Police said Anderson began to kick at the officers as they escorted her to a police car, and went limp during the struggle. But Anderson's brother, Joell Anderson, told Northeast Ohio Media Group that Anderson got nervous after voluntarily getting into the back of the police car.