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A former federal law enforcement official told Fox News Digital that while the FBI likely used basic gumshoe tactics to track Charlie Kirk's suspected assassin, Tyler Robinson probably had no real plan for his escape.

Robinson was on the loose for 33 hours after shooting and killing Kirk on Sept. 10 at a Turning Point USA event on the campus of Utah Valley University. What he did during that timeframe largely remains a mystery, though Fox News Digital learned Thursday that he had an encounter with law enforcement near the campus at around 6:30 p.m. the evening of the shooting.

"We don't have someone acting rationally," Michael Tabman, former special agent in charge of the FBI's Minneapolis Field Office, said of Robinson.

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