Cook County Sheriff Tom Dart's office released video Friday showing correctional deputies using excessive force against jail inmates in six individual cases.

The videos, connected to six separate cases involving 14 disciplined correctional deputies, were posted on the office's website. Incidents captured on video include one inmate apparently being slapped by a correctional deputy in a cell and another inmate being dragged by officers down a hallway.

"The public has a right to know when officers abuse the public trust as well as the ramifications of that abuse," Dart said in a statement. "Transparency is critical to ensuring law enforcement accountability."

The video release, according to the Cook County Sheriff's Office, appears to be the "first time an American jail or prison has voluntarily made use of force video available to the public without requiring a court order or Freedom of Information Act (FOIA) request."

The Chicago Sun-Times reports that five correctional deputies involved in the cases were fired and eight were suspended without pay for a period ranging from 45 to 180 days. One deputy resigned. 

"Most of those deputies were recommended for such serious discipline due to misconduct such as failing to report a use of force, inaccurately describing a use of force in official documentation, being untruthful to sheriff's internal investigators or failing to sufficiently record incidents with handheld cameras," reads a news release from the office. 

The sheriff's office says over $10 million has been invested in the Cook County Jail for the installation of more than 2,400 fixed cameras.