In the past three months, grand juries have indicted as many law enforcement officers in use-of-force cases under Garza s administration as they did within the entire four-year term of his predecessor, Margaret Moore. But even while his office is accruing indictments, experts say there is no guarantee that Garza and his prosecutors will see a courtroom victory. Generally, it is really difficult for prosecutors to get a conviction at trial in a police fatality or police brutality case, said Alissa Marque Heydari, a former prosecutor with the Manhattan district attorney s office. There are many reasons for that. A lot of laws are written such that it is difficult to secure a conviction. Juries can be reluctant to convict a police officer, for various reasons. It is difficult but not impossible to prevail at a trial.