<P> New York City Police Department Detective Bill Szymanski (played by Michael McGlone) is a police detective in the organized crime division at NYPD 8th Precinct who assisted Carter with a mob murder committed by Carl Elias ("Witness", "Baby Blue"). </P> <P> He is an honest cop, that Carter entrusted with the job of guarding Gianni Moretti, Elias' father . Ultimately, Reese had to reveal Moretti's location to Elias in order to save a person of interest, and Szymanski was severely injured in the line of duty and taken to the hospital . Fortunately, he survived ("Baby Blue", "Identity Crisis"). </P> <P> Szymanski fully recovered and went back to active duty where he worked on the investigation of the murder of George Massey's son, who was killed by Riley Cavanaugh ("Triggerman"). </P> <P> Later, Szymanski and the assistant district attorney are meeting with Alonzo Quinn about testifying against the Yogorov mob family . Since HR is in ties with the Yogorovs, Quinn kills Szymanski and the ADA in order to keep them from testifying ("All In"). </P>

When does root appear in person of interest