His credibility is already gone to anybody listening. He said he was approaching Rittenhouse because he was concerned for his (Rittenhouse's) safety after getting hit in the head with a skateboard. He had the gun in his hand because he thought there was an active shooter, but couldn't ever shoot someone because of his "do no harm" oath. And after chasing him (with a Glock in his hand), then backing away, he couldn't really explain why he lunged at Rittenhouse with his pistol accidentally pointed at him.