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Newly-released video shows a corrections officer at the St. Louis City Jail opening an inmate's cell to allow two other men to attack him.

The four-minute jailhouse footage shows two male inmates walking up to talk to corrections officer Demeria Thomas at the podium on the fourth floor in the Bravo unit on March 22. According to a police report, the controls for all the cell doors were located at the podium. Moments later, Thomas is reportedly seen on camera opening the victim's cell door, allowing the first inmate to go in and assault him.

The assailant then attacked the man for more than three minutes, punching and kicking him in the cell. Then the second inmate entered the cell and joined in the assault. Other inmates can be seen running toward the assault, but Thomas told them to stay where they were. Officials said Thomas ordered the attackers to left and closed the cell door. She also at no point called for help or tried to stop the assault, according to charging documents