PROVO, Utah -- Prosecutors are preparing to file a capital murder charge Tuesday against the Utah man who authorities say held a "leftist ideology" and may have been "radicalized" online before he was arrested in the assassination of Charlie Kirk .

Charges against 22-year-old Tyler Robinson are expected to come ahead of the first court hearing since he was accused last week of shooting Kirk, a conservative activist credited with energizing the Republican youth movement and helping President Donald Trump win back the White House in 2024.

Charges against 22-year-old Tyler Robinson are expected to come Tuesday ahead of his first court hearing after he was arrested in last week's shooting

Investigators have been piecing together evidence, including a rifle and ammunition engraved with an

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