OREM, Utah — Grainy images of a slim figure climbing a staircase. An old-model bolt-action rifle recovered in a wooded area. And a footprint.

Investigators said Thursday that they were piecing together these clues and others in the hunt for the killer of Charlie Kirk, the conservative social media star and close ally of President Donald Trump who was fatally shot Wednesday as he was addressing a crowd at a university in Utah.

Two images of what investigators described as a person of interest were released Thursday showing a person in a black shirt, a baseball cap and dark sunglasses.

The killing of Kirk at the campus of Utah Valley University in Orem, Utah, brought already ruptured political discourse in the United States to a breaking point, with politicians canceling events out of fea

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