UPDATED: Synagogue Bombing Suspect Pleads Not Guilty

Ron Hirsch, who  to the  that occurred last month at the , pleaded not guilty to four federal felony counts in a U.S. District Court on Monday morning.

Hirsch reportedly appeared uncertain of the arraignment proceedings when he was in court.

"You can sit on your hands during the trial, and if the government hasn't proven its case, you win," U.S. Magistrate Judge Patrick J. Walsh told him, explaining Hirsch's right to defend himself.

When Hirsch was asked if he understood what Walsh had said, he replied, "I do, your honor.''

Hirsch added that the attorney he had anticipated would be in court to defend him was absent.

Hirsch will return to court later in the day for a hearing. During the hearing, his legal representation and a trial schedule will be discussed.

The four federal charges could put Hirsch behind bars for up to 70 years. Previously, it had been reported that the maximum penalty would be a life sentence.

Hirsch, who is in federal custody, was previously named by a Los Angeles federal grand jury in the four-count indictment.

Last month, after being  in Cleveland Heights, Hirsch waived his right to have hearings in Cleveland and opted to have them moved to the U.S. District Court Central District of California, where a criminal complaint had been filed against him.

The explosion was caused by an approximately 250-pound pipe bomb. No one was injured in the incident, and the motive behind it is still unclear.

Investigators found a receipt dated Apr. 1 for three 11-pound bags of demolition material with Hirsch's name and shipping information on it, according to the affidavit. The receipt was attached to a torn box found near the Chabad House. They also discovered a box containing demolition material that had a label with his address on it.

Hirsch appeared to be an ," said Jerry Elliot, who said the suspect stayed in a on April 10 and returned to the Orthodox Jewish study center the next day.

Elliot said he thought Hirsch was studying, like everyone else in the room, but thought it was odd that he wore "beach clothes" and not the traditional black suit.

A "concerned citizen" called, and the Cleveland Heights Police arrested Hirsch just before 7 p.m., according to a press release from the police department and the FBI. 

“He’s anxious to get back to California and defend these charges against him,” said Daniel Chaplin, a private attorney who represented Hirsch.

He did not say why Hirsch ended up in Cleveland Heights.

“He asserts his innocence,” Chaplin said.

Hirsch waived his right to an identity hearing and confirmed his name was Ron Hirsch. He also waived his right to a preliminary hearing and detention hearing in Cleveland, as was his option because the charges came from another district.

More on the synagogue blast:

• Synagogue Bombing Suspect's Arraignment Date Is Set

•

• 

• 

• FBI Not Ruling Out Other Suspects in Synagogue Blast

• SMPD: Synagogue Bombing Suspect Still at Large

• 

• Synagogue Blast Was Probably Not a Terrorist Act, Anti-Defamation League Director Says

• 

• 

City News Service contributed to this report.

This article was updated at 1:14 p.m.