The Lehigh County district attorney said he knows who shot and killed an aspiring rapper.

Michael Randolph, 23, was shot at the North End Republican Club on North Eighth Street in Allentown early Sunday morning, police said.

District Attorney Jim Martin announced Wednesday that a security guard working at the club is the one who shot Randolph, whose death has been ruled a homicide.

So far, the security guard has not been charged, Martin said.

The investigation is ongoing.