You mean the other good guy with a gun? The paramedic who assumed that Rittenhouse was the shooter of two men already dead. He pulled his sidearm from is medical bag and reacted to Rittenhouse as an active shooter. Isn't that what he was supposed to do?

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"Facts: Grosskreutz, who was at the protest as a volunteer paramedic when Rittenhouse shot him in the right arm during a confrontation, testified in court that Rittenhouse’s rifle was pointed at him while Grosskreutz initially had his hands in the air."

"But Grosskreutz, who had a gun in his right hand at the time, admitted that it was not until he lowered his hands and was moving toward Rittenhouse with his pistol pointed at him that Rittenhouse fired a shot."

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https://www.factcheck.org/2021/12/viral-post-misrepresents-facts-in-rittenhouse-trial/