You're also assuming it's a civil service position. Could very well be in a Sheriff's Department where the Sheriff can fire or hire anyone qualified at will. That being said we aren't given enough information. It could be a Sheriff, a Chief of Police, or perhaps a mayor threatening his chief of police. I 'really' dislike it when D/As think they are the bosses though, really really do.
In all likelihood though, if someone legitamately earned a homicide detective spot, they should be doing their job. They should have proved they could do their job to get to that position. (imo)
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