He was subdued by a number of guards and taken to a separate holding pen.
Two days later, he was later found unresponsive and pronounced dead.
The Medical Examiner ruled that Mobley suffered "blunt trauma to the abdomen with laceration of the liver with internal bleeding."
Department of Corrections spokesperson Steve Morello said the department is cooperating with the Bronx District Attorney's office.
"We've provided all our information relative to the incident to the Bronx district attorney's office, which has been involved in this investigation since the night of the incident. We extend our sympathies to Mr. Mobley's family and we await the results of the DA's investigation."
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