President Donald Trump stands with Attorney General William Barr during the 38th Annual National Peace Officers\u2019 Memorial Service at the U.S. Capitol, Wednesday, May 15, 2019, in Washington. (Evan Vucci\/Associated Press) By Kevin Freking\u2009|\u2009AP May 15 at 7:33 PM WASHINGTON \u2014 President Donald Trump used a ceremony for fallen law enforcement officers on Wednesday to criticize big-city prosecutors he asserts don\u2019t go after criminals who pose a severe threat to public safety. Trump pledged to the families of fallen officers that the country will \u201cnever, ever leave your side, never disappoint you\u201d but went beyond memorializing for much of the annual event. He singled out prosecutors in Philadelphia and Chicago as being part of a \u201cdangerous trend\u201d by deciding not to prosecute \u201cmany criminals who pose a severe threat to public safety and community well-being.\u201d He provided scant context for the claim, and prosecutors in those cities did not immediately respond to requests for comment. The president also renewed his calls for changes to the nation\u2019s immigration laws, citing the shooting death last December of a Northern California police officer, Cpl. Ronil Singh. Trump said the suspect in Singh\u2019s killing could have been kept out with \u201cborder security, with the wall, with whatever the hell it takes.\u201d Paulo Virgen Mendoza, suspected of being in the country illegally, has pleaded not guilty in the case. Trump also made an apparent reference to the case of actor Jussie Smollett, saying that \u201cthose who file false police reports should face full legal consequences.\u201d The actor was charged with felony disorderly conduct and accused of making a false police report after claiming he was attacked by two masked men who shouted slurs at him and put a noose around his neck. The Cook County state\u2019s attorney\u2019s office abruptly dropped the charges in March. The White House did not comment on whether Trump was specifically citing the Smollett case. The 38th annual memorial service honored 228 peace officers who died in the line of duty last year. ___ Associated Press writer Deb Riechmann contributed to this report. Copyright 2019 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.