President Donald Trump’s 31-year-old would-be assassin, Cole Tomas Allen, pleaded not guilty in court Monday to all charges.

At the White House Correspondents’ Dinner on April 25, the former California teacher and engineer, armed with knives and guns, broke through a security checkpoint and shot a guard in the chest before being tackled by security officers and detained. The guard who was shot was wearing a bulletproof vest and was not seriously injured.

Allen was charged with attempting to assassinate the president; transporting a firearm and ammunition through interstate commerce with intent to commit a felony; discharging a firearm during a crime of violence; and shooting a Secret Service agent.

Allen appeared in court wearing an orange shirt and trousers. He wore shackles and handcuffs attached by a chain to his waist that clanked as he walked into the courtroom.

Allen’s sister told law enforcement that, while her brother occasionally made radical commets, no one in the family knew that he kept firearms in their home and trained at shooting ranges. Allen himself told the FBI that he had not expected to survive the assassination attempt. Following his detention, he was briefly placed on suicide watch.

Allen’s next court hearing is scheduled for June 29.