Andrey Desmond was discovered at 6:45 a.m., the Department of Corrections says.
Desmond was taken to a hospital, where he later died.
The Office of the Chief Medical Exam says an autopsy was performed on Tuesday but they are awaiting results.
Desmond was serving a five-year sentence for assaulting
state Rep. Maryam Khan following a Muslim prayer service celebrating the Eid al-Adha holiday.