Where a police officer is off-duty but is the victim of a crime and responds to it by trying to apprehend the criminal, they are acting in the performance of their official duties, and if they are killed, the sentencing enhancement for the murder of a police officer in the course of their official duties is appropriate.The 1st District Appellate Court affirmed the decision of Cook County Associate Judge Timothy J. Joyce.Chicago police officer Thor Soderberg was shot to death on the afternoon of July 7, 2010. Soderberg …