LOS ANGELES: An Egyptian flight student is expected to appear in immigration court Friday to determine whether he should be deported after being investigated by federal agents for posting threatening comments on his Facebook page about Donald Trump.

Emadeldin Elsayed, a 23-year-old aspiring pilot from Cairo, has a hearing scheduled before Immigration Judge Kevin Riley in Los Angeles.

US Secret Service agents interviewed Elsayed about his post in early February, then returned to his Los Angeles-area flight school eight days later and told him federal prosecutors were not charging him with a crime but his visa had been revoked.

Immigration authorities then arrested Elsayed. He has been detained since Feb. 12 at an Orange County jail.

Elsayed wrote that he was willing to serve a life sentence for killing Trump and the world would thank him, said his lawyer, Hani Bushra.

Elsayed said he was angered by the Republican presidential contender’s comments about banning Muslims from traveling to the United States, but never intended to harm anyone.

Trump has used especially tough talk on immigration during his campaign. The Republican presidential contender has vowed to build a wall along the entire Mexican border and called for a temporary ban on Muslims from entering the country.

Immigration and Customs Enforcement said in a statement that Elsayed was arrested because he violated “the terms of his admission to the United States.” The agency did not provide further details.

Immigration authorities alleged in court filings that Universal Air Academy had tipped off federal officials to the Facebook post, Bushra said.

Separately, dozens of conservative national security experts warned on Friday that Donald Trump was unfit to be commander in chief.

Former Homeland Security Secretary Michael Chertoff and more than 70 others said they were united in their opposition to a Trump presidency.

They said Trump’s “embrace of the expansive use of torture” is inexcusable. They also object to what they say is Trump’s “hateful, anti-Muslim rhetoric” and his advocacy for waging trade wars.

The letter said Trump’s vision of “American influence and power in the world is wildly inconsistent and unmoored in principle.”

Among the experts who signed on Frances Townsend, homeland security and counterterrorism adviser to President George W. Bush; Eliot Cohen, a former counselor to the State Department; and Dov Zakheim, a former Pentagon comptroller.