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Tyler Robinson's motive for why he allegedly assassinated TPUSA founder Charlie Kirk may be more important during the sentencing phase as prosecutors will try to "dirty up" the suspect in hopes that jurors return a death sentence, according to a former assistant U.S. attorney.

Robinson is accused of assassinating Kirk during a TPUSA event on Sept. 10 at Utah Valley Univerisity in Orem, Utah, officials said. He's been charged with aggravated murder , two counts of obstruction of justice and felony discharge of a firearm causing serious bodily injury, two counts of witness tampering and commission of a violent offense in the presence of a child.

Officials claim Robinson allegedly said he killed Kirk because he "had enough

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