Were the petitioner's Fifth and Sixth Amendment rights violated by the ambiguity of the Dixon standard as applied regarding what constitutes a 'well-founded' fear of imminent threat

Question Presented Were the petitioner’s Fifth and Sixth Amendment rights violated by the ambiguity of the Dixon standard as applied regarding what constitutes a “well-founded” fear of imminent threat—a standard that appears to vary between Circuit Courts of Appeal—that barred him from raising a justification defense when (1) the gang responsible for shooting and disabling him were known to be acquiring guns to kill him and (2) the Government believed the threat imminent enough to follow the petitioner and intervene? 1