Federal grand juries in the nation’s capital have refused to indict suspects in at least seven cases tied to President Donald Trump’s federal crime crackdown, including individuals accused of threatening to assassinate the president and assaulting law enforcement officers.

A Washington, D.C., federal grand jury refused to indict a woman who allegedly threatened against President Donald Trump. No indictments appears to be a trend.

It is extraordinarily rare for a grand jury to refuse to return an indictment, but that has happened in other cases prosecuted by U.S. Attorney Jeanine Pirro’s office since Trump ordered a surge in patrols by federal agents and troops in the District of Columbia.