During the initial briefing, SSA Matt Simmons says, "You know, I come from Michigan, not the Motor City, Carson City..." while talking about the case. Daniel Henney (Simmons), was born in Carson City, MI.
Eunuchs have been around for centuries, cutting off their genitalia was a purely practical procedure, usually to ensure there could be no possibility of a sexual relationship between them and the women, usually wives of a King, they cared for.
(No-one was as bothered about the faithfulness of their male lovers.)