President Donald Trump took the unusual step Tuesday of firing FBI Director James Comey. As Comey was the subject of a Department of Justice Inspector General investigation and allegations of misconduct, both supporters and opponents will be wondering if he could face jail or prison time.

A memorandum by Deputy Attorney General Rod Rosenstein made public Tuesday cited Comey’s handling of the FBI’s investigation into Hillary Clinton’s use of private email servers as the reason for recommending his dismissal.

But that reason does not rise to the level of a crime, according to Kathleen Clark, a professor at the Washington University School of Law and an expert on government ethics. “These are violations of policy, longstanding Justice Department policy,” she says, but not criminal violations.