Supoena on page 3 of this file
The person posting was Roberto Grijalva, a prison guard working at the prison where Epstein was jailed. His name is listed on page 88 of the above document.
See page 851 of this other pdf with proof of his employment. This apparently did not result in him being fired, as an inmate sued him in 2023 for use of excessive force.
I see a lot of dead bodies for work. They look the same for a good many hours. Just pale. By the time they get to a casket it’s 5 days later, they’ve been embalmed, mouths stuffed with cotton, and wearing a load of caked on makeup.