And no, witnessing someone who is obviously not a jogger (even if we grant you that) suddenly starting running does not constitute "imeddiate knowledge of a crime". It may be because the person just realised they were spotted doing something suspicious, or it may be because they got a call that their sister has been hospitalised. And even if it was the former, they may have understood that what they were doing looked suspicious because their intent was illegal, or because they suddenly realised what it might look like to others although their actual intent was innocent.
So, assume for the sake of the argument that he wasn't running until he was spotted. That's still no grounds for a citizen's arrest.