Who says prison authorities have the obligation to protect every inmate?
And if you think a rapist is going to take the time to use a condom, then....
“Who says prison authorities have the obligation to protect every inmate?”
18 U.S. Code § 4042 - Duties of Bureau of Prisons
(a) In General.— The Bureau of Prisons, under the direction of the Attorney General, shall—
(3) provide for the protection, instruction, and discipline of all persons charged with or convicted of offenses against the United States;