Things may be looking grim from a legal standpoint for President Trump.

We all know that Special Counsel Robert Mueller, a former FBI director, is investigating the president and those in his inner circle regarding possible collusion by Russia during his election campaign.

As Fox’s Judge Andrew Napolitano says in this disturbing clip, Trump supporters have every reason to be worried about the inquiry, despite assurances from the president and his spokespeople to the contrary. That’s because the moves Mueller has made so far are the standard operating procedure of a prosecutor who doesn’t play games. As Napolitano states, one of the first things such a prosecutor will do is to go after “the small fish” that surround “the big fish” in a case to see if there are any crimes — even unrelated ones — that they can be indicted for.

Former Trump campaign manager Paul Manafort was put under surveillance and the FBI conducted a no-knock, pre-dawn raid on Manafort’s house to gather evidence. This was done specifically to prevent Manafort from destroying any documents. Stories in the media have suggested that Manafort will almost certainly be indicted soon for some crime, probably not related to the Trump campaign.

But if Manafort is guilty and looking at a heavy-duty sentence, Mueller may try to “flip” him into testifying against Trump. The same goes for other figures who have been close to the president, such as his son-in-law Jared Kushner (who has had shady real estate dealings) and former National Security Advisor General Mike Flynn.

Adding to worries is the fact that two of Trump’s lawyers, Ty Cobb and John Dowd, were overheard discussing Trump’s legal defense in a Washington, D.C. restaurant by a New York Times reporter, thus revealing to Mueller some of Trump’s legal defense strategy. All of this and more spells bad news for the president, and Napolitano lays out why in this provocative segment.