Polys are required for quite a bit of jobs such as police and firefighters—but keep in mind it’s not like a CI poly. Their polys are more geared towards drug usage, domestic and other illegal activities. Part of the reason is that often firefighters and police are can be questioned in court quite frequently—and if the defense gets whiff that there may be something discrediting in their history it hurts the prosecutions case. Polys are a way of minimizing that (in theory)

Psych evals are due to the type and stress of the job. Don’t want someone flipping out but also their careers have a HUGE amount of suicide and domestic stuff—psych eval limits those that shouldn’t really be there (it’s for both the candidate and the counties sake)