One of three inmates accused in a violent attack on correction officers inside a Massachusetts prison last month is expected to face a judge on Thursday.
Heriberto Rivera-Negron, 36, is slated to be arraigned in Clinton District Court on charges of mayhem, assault to murder, and armed assault to murder, according to the Massachusetts Department of Correction.
Two officers were assaulted by incarcerated individuals at the Souza-Baranowski Correctional Center in Lancaster, suffering multiple stab wounds on the evening of Wednesday, Sept., 18, authorities said. Three other officers were also hurt while responding to the incident.
Days later, the Massachusetts Correction Officers Federated Union released a video of the attack . A union spokesperson said that although the video is “horrifying,” it’s not surprising.
The stunning footage shows an inmate swinging at the head of an unsuspecting officer. Moments later, another inmate joins in on the assault. The scuffle continues for about a minute until other officers arrive.