IOWA CITY, Iowa (AP) — According to an Associated Press investigation, Iowa’s Attorney General hasn’t convicted a police officer for improperly using force since at least 2004, which was the earliest date for which records are available. Attorney General Tom Miller’s office only pursued charges against two officers out of 35 force cases it reviewed, and both of them were ultimately acquitted. Police officers often aren’t charged when someone ends up dead.

Laws often shield officers and give them the benefit of the doubt for a dangerous and unpredictable job, and juries can be reluctant to convict. But prosecutors who have a history of declining to charge police are now facing scrutiny of their records following a summer of mass protests calling for accountability.