Routh was charged in federal court on Monday with two firearm offenses, possession of a firearm as a convicted felon and obliterating the serial number on a firearm. Additional charges related to the apparent assassination attempt could come later, Paralel.Az reports citing CBS News.

If convicted on the two firearms charges, he could face a maximum sentence of 20 years.

He was questioned by the judge to determine his eligibility for a public defender. He told the court that he has a job that pays $3,000 per month, but when asked whether he has any other assets, he replied that he had "zero funds." He said he has two trucks in Hawaii that are worth about $1,000. And when asked about dependents, he replied that he has a 25-year-old son. The judge appointed a public defender to represent Routh.

Routh's initial appearance in court was brief, just under 10 minutes. He appeared in court in a blue jail-issued jumpsuit and was shackled and handcuffed. His demeanor was very relaxed, despite the gravity of the charges, and he smiled and laughed at times with his lawyer.

The government will ask for pre-trial detention, asserting that Routh is a flight risk and a danger to the community. His bond hearing has been scheduled for Sept. 23. And his probable cause hearing will be Sept. 30.