On the day of the indoor event in Visalia, which drew 2,000 people, some 60 law enforcement officials monitored Kirk's movements to and from the church, even deploying a drone to secure surrounding rooftops, said Tulare County Sheriff Mike Boudreaux.
As Charlie Kirk crisscrossed the country, security levels varied from venue to venue
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He said his investigators caught up with the cartel assassin after he left a gas station receipt at the scene of a homicide.
Mexican cartel assassins operating in U.S., sheriff testifies to Congress
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