In a small CA county, a police officer, described by other police as a "screw-up," has floated from one small department to another. At his previous job he was allowed to resign. He was under investigation for a serious crime while on duty. When an officer leaves his job all internal investigations cease.
I imagine this would look like a good option for a police chief concerned about his appearance and the reputation of his department. He could get rid of his problem without having to disclose anything at all. Of course, the screw-up just gets hired in the next town and continues to screw up. The way he screws up is to abuse his power and use too much physical force, stalk women, etc.
It' like the Catholic Church sex abuse scandal. Protect the church by moving pedophiles from one parish to the next.
This is one of the results of making police personnel files confidential and the all the unecessary secrecy police unions have cowed legislators into passing. Police feared their safety would be threatened unless complaints against them were top secret. What they did is protect the worst of the worst.