Over the past week, former President Donald Trump has been making a bold claim: “Over 13,000, the exact number’s 13,099, convicted illegal alien murderers are now on the loose,” he said during a campaign rally on October 1. A few days before that, Trump wrote on Truth Social that “13,000 convicted murderers entered our Country during [Kamala Harris’] three and a half year period as Border Czar.” That number comes from a letter that Rep. Tony Gonzales (R–Texas) shared on X last week. The letter, which is from Immigration and Customs Enforcement (ICE), describes the noncitizens on the agency’s d…