Philadelphia Police officers killed in the line of duty in 2008 were engraved April 29, 2009 on the marble walls of the National Law Enforcement Officers Memorial in Washington, DC. Sergeants Stephen Liczbinski and Patrick McDonald were shot and killed by armed criminals, and Sergeant Timothy Simpson and Officer Isabel Nazario died in violent traffic crashes. The four deaths were the most suffered by any US law enforcement agency last year. ... Philadelphia "Fallen Officers" "Philadelphia ...