Cole Tomas Allen took a selfie photo in his Washington Hilton Hotel room about a half hour before he tried to storm through a security checkpoint with several guns and assassinate President Donald Trump at the White House Correspondents’ Dinner on Saturday night, federal prosecutors said in a court filing Wednesday.

The photo of Allen, which is in the filing, shows him wearing a small leather bag that is consistent in appearance with an ammunition-filled bag later recovered from him, a shoulder holster, a sheathed knife that appears to be one of the knives later recovered from him, “and pliers and wire cutters consistent in appearance with those later recovered from his person,” the filing says.

Prosecutors included the photo, as well as photos of guns and knives that Allen was allegedly carrying on Saturday, to argue he should be detained without bond.

A detention hearing for the 31-year-old California resident is scheduled for Thursday in U.S. District Court in Washington.

Allen has been held since he was tackled by Secret Service officers on Saturday, before he could run down a staircase to the ballroom where Trump, Vice President JD Vance and other top Trump administration officials were attending the annual media soiree.