Adrian Rucker, 25, of Freeport, was armed with a rifle when he encountered police Thursday night inside an apartment building in Chatham, police said. An officer then inadvertently fatally shot another cop,

An Illinois man has been charged in connection to the accidental shooting death of Chicago police officer Krystal Rivera Thursday evening in the city's East Chatham neighborhood, police said.

Adrian Rucker, 25, of Freeport, Illinois, is facing multiple felonies, including armed violence, possession of a fraudulent ID, and possession of a firearm without a FOID card.