William DiRenzo began his career as a prosecutor at the State Attorney's Office in 1998. As an Assistant State Attorney, Mr. DiRenzo was a senior trial attorney responsible for handling thousands of criminal cases. He has lectured and assisted other lawyers and police officers on a variety of issues concerning jury selection, cross examination, motion practice, and search and seizure. While an Assistant State Attorney, Mr. DiRenzo was promoted to the position of lead prosecutor in the felony trial division where he tried cases ranging from Possession of Cocaine to Attempted Murder. As a lead felony prosecutor, he was also responsible for supervising and assisting three other Assistant State Attorneys that worked under him.