On May 9, Trump fired Comey. This is likely a crime: Obstruction of Justice. Mueller is sorting this out now. President Trump fires FBI Director James Comey while Comey was in Los Angeles addressing an FBI field office. Comey saw the announcement on TV and, at first, thought it was a joke. Comey returned from his trip on a government plane.
Verified: This act is not in dispute. Whether this act rises to a prosecutable crime is. Later, Trump admits on national TV that he did this because of the Russia investigation. He also tells the Russian spy master, “the pressure is off” in the oval office. We find out about this from Russia.