NEW YORK — New York prosecutors are using a 9/11-era anti-terrorism law in their case against the man charged with gunning down UnitedHealthcare’s CEO outside a midtown Manhattan hotel. Luigi Mangione was indicted on charges of murder as an act of terrorism, under a state law that allows for stiffer sentences when a killing is aimed at terrifying civilians or influencing government. [time-brightcove not-tgx=”true”] If it sounds like an unusual application of a terrorism law, it’s not the first time the statute has been applied to a case that wasn’t about cross-border extremism or a plot to kill masses of people. Mangione is jailed on other charges in Pennsylvania, where he is scheduled to appear at an extradition hearing Thursday that could clear the way for him to be brought to New York. Here are some things to know about the anti-terrorism law and the case surrounding the death of Brian Thompson. What does the law say? Mangione is charged with first-degree and second-degree murder counts that specifically refer to a New York law that addresses terrorism.