A 12-year-old boy who died at a North Carolina wilderness camp was smothered, according to an autopsy that was released on Monday.

The autopsy shows the boy’s death is now being reported as a homicide. The child was found dead at Trails Carolina on Feb. 3. The North Carolina Department of Health and Human Services revoked the facility’s license in May, saying it failed to comply with state regulations. The department said the camp failed to follow state law regarding the rights for people living with mental illness, developmental disabilities or substance abuse.

An April report by the state found that the camp failed to check if the boy was breathing while requiring him to sleep in a “bivy,” a small sleeping-bag-like tent, that was covered by a plastic sheet. At some point, staff determined “there was an issue” with the zipper, according to NBC News. An unidentified staff member assigned to sleep next to the boy heard someone “breathing heavily” at one point, but couldn’t determine if it was the boy or another employee.

Staff members called 911 when the boy did not respond to attempts to wake him and emergency personnel were unable to revive him, the camp said at the time.

In the wake of the boy’s death, Trails Carolina was barred from taking in new admissions and all existing children were removed from the facility. Amidst the investigation, a former student sued the program, claiming staff members dismissed her claims of sexual assault by another camper in 2016.