WATCH: Mueller destroys Trump’s claim he was vindicated – and says he was ‘bound’ by policy prohibiting charging president

In his first remarks since being appointed Special Counsel, Robert Mueller Wednesday morning said: "it would be unfair to accuse someone of a crime" when they cannot be charged in court. He referred to standing DOJ policy.

He made clear that he did not consider charging President Donald Trump because he knew he could not indict him. Mueller also said that he found substantial evidence that the President obstructed justice.

Mueller said that "under long-standing department policy a president cannot be charged with a federal crime while he is in office. That is unconstitutional. Even if the charge is kept under seal and hidden from public view, that too is prohibited.”

“If we had had confidence that the president clearly did not commit a crime, we would have said so. We did not, however, make a determination as to whether the president did commit a crime. The introduction to the volume two of our report explains that decision.”

"Charging the president with a crime was therefore not an option we could consider."

Watch:

Mueller: "As set forth in the report, after that investigation, if we had had confidence that the president clearly did not commit a crime, we would have said so. We did not, however, make a determination as to whether the president did commit a crime." https://t.co/xP04w69GH0pic.twitter.com/mImtXRrug2

— ABC News Politics (@ABCPolitics) May 29, 2019