Investigators released surveillance footage showing a person believed to be the shooter jumping from a rooftop shortly after the incident. Additional video, geolocated to a neighborhood near the crime scene, shows someone matching the suspect’s description walking calmly along a street in the minutes before the gunfire erupted. Officials said the images are crucial in piecing together the suspect’s movements before and after the attack.

Forensic experts analyzing audio captured near the podium where Kirk was addressing supporters concluded that he was likely hit by a single supersonic gunshot. Investigators also recovered a rifle and ammunition at the scene, both of which reportedly bore phrases tied to political issues, suggesting the act may have carried ideological motivations.

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Law enforcement agencies have mobilized resources nationwide, vowing to track down the shooter. The killing has sparked fresh debate about political violence in the US and intensified calls for tighter security at public gatherings.