GREENVILLE COUNTY, SC (WSPA) — The family of Charles Weslie Johnson, 57, has filed a lawsuit against Greenville County.

WARNING: You may find the video (above) disturbing.

According to the coroner, Johnson was being held at the Greenville County Detention Center, in 2014, when he started having seizure like systems.

He was eventually taken to Greenville Memorial Hospital where he was pronounced dead.

According to the lawsuit, another inmate originally found Johnson on the ground, foaming at the mouth.

One staff member at the detention center thought Johnson was having a seizure but another believed his actions were behavioral.

Surveillance video shows Johnson was placed in a restraint chair.  He can be seen jerking under straps and buckles.

At one point, 56 minutes passed before Johnson was checked on, according to the lawsuit.

He was later found unresponsive, which can be seen in the video.

“We cannot wrap our heads around why Mr. Johnson was restrained,” said attorney Robert Jones.

Attorneys say Johnson was tied down and left in an empty room during an evident medical emergency.

Jones told 7News that Johnson was admitted to the to the hospital ten days before his death for a possible seizure.

“So this is something that should have been on their radar,” Jones said.

Johnson lived in Piedmont and was held in the Greenville County Detention Center for a drug violation against his probation.

“He went there with hopes of being cleaned up and kind of rehabilitating his life. Unfortunately and tragically, he never made it out,” said attorney Jones.

The lawsuit was filed against Greenville County, Greenville County Sheriff’s Office, Greenville County Detention Center Medical Clinic, and an affiliated MD.

The Greenville County Sheriff’s Office says it will not comment during pending litigation.