On July 26th, the FBI raided Paul Manafort’s home in Alexandra, Virginia. The FBI seized documents and other materials from Manafort’s home in relation to the Russia investigation.

Manafort, who was Trump’s campaign chairman, has appeared cooperative to investigators in public. Even going as far as to voluntarily testify before a Senate Intelligence Committee on July 25th.

However, there are clearly questions that the FBI felt still needed to be answered. According to Politico, Federal Investigators approached Manfort’s son-in-law, Jeffrey Yohai, in an attempt to get inside his head.

Peter Zeidenburg, a former prosecutor for the Justice Department, commented:

“It is a big deal. Prosecutors do not take aggressive steps like this with subjects who the government feels are being open and cooperative. And they also do not do this to ‘send a message.’ They do it because they think there is evidence to be found and that if they do not act aggressively, it could be destroyed.”

The simple fact is that obtaining a search warrant usually requires investigators to have a rational reason to believe that there is evidence of a crime. Nor does the FBI execute warrants on cooperating witnesses, they don’t need to.  What the investigation will prove cannot be known. Nevertheless, the President Trump’s Administration has cause for concern.