Luke J. Helder, of Pine Island, Minn., was charged Tuesday after a high-speed chase along a desert highway followed by a phone conversation with an FBI negotiator and his parents.
Federal prosecutors in Iowa charged Helder with using an explosive to maliciously destroy property affecting interstate commerce and with using a destructive device to commit a crime of violence. The charges carry penalties of up to life in prison and fines of $250,000. In addition, he was booked on a federal firearms charge.
U.S. Attorney Charles W. Larson said Helder was responsible for the injuries suffered Friday by a woman in Tipton, Iowa. Federal charges also were expected to be filed in Illinois, Larson said.
Washoe County Sheriff Dennis Ballam said Helder would go before a federal magistrate on Wednesday in Reno, where he is likely to be held for a few days before being transported to face charges.
After Helder surrendered, bomb squads called to the scene along Interstate 80 some 50 miles east of Reno dismantled five pipe bombs found in the car, said Maj. Rick Bradley of the Nevada Highway Patrol.
Early Wednesday, a handcuffed Helder was led into the Washoe County Jail by four federal agents. Wearing a black Kurt Cobain T-shirt and long, baggy tan shorts, his hair mussed, Helder offered no comment.
Helder was enrolled as a junior majoring in art and industrial design at the University of Wisconsin-Stout, located in Menomonie, Wis. He had apparently not attended classes since at least April 24, a school official said. A local police spokesman, Brian Swantz, said two houses nearby were evacuated because of "potential danger" but refused to elaborate.
The capture came just eight hours after the FBI issued an all-points bulletin for Helder and said it wanted to question him about the 18 pipe bombs found since Friday.
Six people — four letter carriers and two residents — were wounded by bombs left in mailboxes in Illinois and Iowa. Twelve other bombs found in Iowa, Nebraska, Colorado and Texas did not explode. Most of the bombs were accompanied by anti-government propaganda warning that more "attention getters" were on the way.
After Helder's license plate and car description were broadcast nationwide Tuesday, a motorist on Interstate 80 spotted Helder's vehicle and tipped off authorities. He was pulled over after a 40-mile chase that reached 100 mph.
FBI agent Terry Hulse said Helder telephoned his parents during the chase and was patched through to an FBI negotiator. He said Helder stayed on the phone with the FBI after pulling over east of Fernley and volunteered to surrender if he was not harmed.
Authorities said Helder dropped a gun out his car window and was taken into custody without incident. At least one other gun was found in the car, authorities said.
FBI agent Jim Bogner in Omaha, where the investigation is centered, refused to say how Helder had become part of the case.
But a college newspaper in Wisconsin said it gave the FBI a seven-page letter Tuesday that it received over the weekend and was signed with Helder's name.
The letter was postmarked in Omaha on Friday — the day the first bombs were found in Iowa and Illinois, and a day before bombs turned up in Nebraska — and its first page is identical to the anti-government notes found with the bombs.
The letter also said, in part: "I will die/change in the end for this, but that's OK, hahaha paradise awaits!"