An investigation into the death of 35-year-old William Avant revealed he was asphyxiated at Columbia's G. Werber Bryan psychiatric hospital, the state said Monday.
Staff said the incident occurred in January 2018 as he tried to calm Avant, who was suffering from a chromosomal disorder known as Klinefelter Syndrome.
The employees held the patient restlessly on the ground while he was in a corridor and lying on the ground for four minutes, according to the press briefing.
Officials stated that staff members did not control their breathing, as required by staff training to retain patients.
On his return, Avant had no pulse and was blue-faced, officials said. He was taken to the hospital where he was pronounced dead.
The law enforcement division of the state of South Carolina refused to lay charges in this incident, said the state