Fresno State University lecturer Lars Maischak got into some hot water after tweeting that President Trump “must hang” to save American democracy.

Maischak wrote the tweet in February to his measly 28 followers, but it wasn’t until Breitbart News picked up on it earlier this month that people saw it and became outraged.

The history department professor will no longer be teaching for the rest of the semester and the university will conduct an investigation to whether or not more discipline is needed. A petition as even been circulating for Maischak to be fired.

Maischak released an apology statement last week:

“My statements each represent the end point of a dark train of thought triggered by my despair over the actions of the U.S. government. It felt cathartic at the time to write them down. I never expected them to be read by anyone but a close circle of acquaintances who would know to place them in their context.”

You can’t just threaten the life of the President of the United States. The Secret Service and FBI will most likely be watching the professor very closely from now on.