The Florida Department of Law Enforcement is the lead agency investigating the deaths of the inmates and the department's Office of Inspector General is assisting. Visitation was canceled Sunday at Columbia Correctional Institution. The overdoses occurred in the annex portion of the Columbia Correctional Institution, which is a separate building from the main one. According to the FDOC, 20 people have died in the Columbia Correctional Institution Annex since 2014. Columbia Correctional Institution has seen a host of problems over the years.