evidence: Gaetz’s attorney and the Justice Department declined to comment. Gaetz himself has long denied allegations that he had sex with a minor, that he ever transported the alleged victim across state lines to engage in prostitution or that he obstructed justice in an effort to cover up his actions — the three main potential crimes he has been investigated for, according to three sources familiar with those aspects of the case. [...] The potential witnesses in the federal government’s inquiry into Gaetz is not limited to Greenberg, the alleged victim and Gaetz’s ex-girlfriend. [...] Gaetz has attacked the Justice Department for not doing more to prosecute alleged co-conspirators who tried to shake down his wealthy father, former state Senate president Don Gaetz, for $25 million in return for securing a presidential pardon of the congressman in the sex crimes investigation. Gaetz’s father went to the FBI and wore a wire to catch the suspects — one of whom has since pleaded guilty.