The deputy's identity is not currently being released pending notification of his family.
Police arrived, secured a perimeter, and attempted to make contact with Sealy. He then fired multiple rounds at the officers from inside the home.
Details on why there was a response to the inmate's room and whether a weapon was used were not released.
A Federally recognized tribe, the Navajo is the largest in America, with 200,000 of its 300,000 members living on the 27,000-square-mile reservation, which covers parts of Arizona, New Mexico and Utah.
Authorities released the body camera footage showing the deadly altercation that took place between Logan County Sheriff's Deputy David Wade and Nathan Aaron LeForce.