It's called qualified immunity. Many support its repeal. I hope you join them, and convey the same to your local representatives and candidates. Until it is reformed few if any officers or administrators of criminal justice in the United States will ever feel any type of accountability.

Short of video evidence of blatant gun to the back of the head style homicide qualified immunity means most law enforcement officials are never held accountable for their miscarriages of justice. Criminal charges against officers are exceedingly rare. She should be able to sue this detective directly. Of course she can sue the government too, and should. But without any personal consequences for the people carrying out these acts, taxpayers will continue to bail out these practices without ever noticing. Your own government should not be a shield for a police officer who has violated you or your neighbors.