why is the expected time a person spends on the under cover prostitution vice squad only 6 months?

Question

i've heard that's about how long a under cover officer lasts before experiencing burn out and requesting reassignment.

Answer 1

You've heard wrong!, the reason for only allowing an undercover to work the streets for 6 months is because after so many busts and so many disguises, the street people, start to recognize them and their effectiveness is diminished, and the risk of danger becomes more prevalent.

Answer 2

probably want to do real police work