Sept. 8 (UPI) — Jury selection got underway Monday in the trial for Ryan Routh, over his alleged assassination attempt against President Donald Trump in September 2024.

Routh, now 59, entered a federal courthouse in Fort Pierce, Fla., for the start of his criminal trial in what’s likely to be a three-day jury selection process.

He pleaded not guilty to charges of attempting to assassinate a major presidential candidate, assaulting a federal officer and multiple gun violations after he allegedly waited for then-candidate Trump nearly 12 hours around the perimeter of Trump’s golf club in West Palm Beach on Sept. 15 before later caught by Martin County Sheriff’s deputies.

In addition, Routh has pleaded not guilty to separate charges filed by the state on terrorism and attempted murder.

The trial is expected to last around a month and Routh will be representing himself during court processings.

In December, U.S. Southern District Judge Aileen Cannon set the trial date to begin.

Routh, a construction worker who was from Hawaii and North Carolina, was found when a Secret Service agent discovered the barrel of an SKS-style rifle protruding through the tree line near the golf course’s sixth green.

The agent shot at Routh, who fled the scene but was arrested on a nearby highway after a chase with sheriff’s deputies.

Meanwhile, Routh is facing the possibility of life in prison.

Opening statements in Routh’s trial are expected to be heard on Thursday.