The new firebrand of an acting U.S. Attorney for the District of Columbia promises to bring sweeping changes to how the nation’s capital uses the city’s prosecutorial tools.

A conservative radio host who ran the weekly Pro America Report for years, Martin was a St. Louis lawyer and an active figure in Missouri politics for decades before being nominated last month by President Donald Trump to be Washington’s top prosecutor. Martin has already begun to dismantle Biden-era criminal justice policies in D.C. as exemplified by his announcement this week launching more severe consequences for gun crimes.