Ryan Lucas

He sat at the defense table with two public defenders who the judge had appointed as his counsel.

Now, the magistrate judge explained the proceedings to Allen, asked Allen a few questions.

He responded to many of those questions with either, yes, your honor, or no, your honor.

The judge also ordered this case unsealed, and Allen has been charged by criminal complaint with three counts, the most serious one attempted assassination of the U.S.

president,

The other two charges are both related to the guns he allegedly had on him on Saturday.

investigators are continuing to interview witnesses and people who knew Alan.

They'll be building a profile.

They'll be trying to trace his actions, his footsteps, so to speak, in the weeks, days, and of course, hours leading up to what happened on Saturday night.

So far, officials say they believe Alan acted alone.

They don't see any sort of foreign involvement, foreign nexus here.

Now, Justice Department officials have said that Alan will face charges.

As of now, the initial ones are expected to be

assault on a federal officer with a dangerous weapon and using a firearm in a crime of violence.

They also expect to add more down the line.

NPR's Ryan Lucas has more.

Shots were fired Saturday night at the Hilton Hotel where President Trump and other administration officials were attending the White House Correspondents' Dinner.

Authorities say the suspect, Cole Allen, had tried to rush past security and stormed the ballroom where the event was taking place.

Officials say Allen was armed with guns and knives.

Investigators have been scrambling to collect evidence since the incident.