A resident of Dublin, Ireland, Adam Stuart Busby, 64, is facing more than two dozen charges in connection with a rash of at the University of Pittsburgh in the closing weeks of the spring semester.
A federal grand jury returned two indictments today against Busby. He is charged with emailing bomb threats targeting the University, three federal courthouses, and a federal officer.
A separate four-count indictment charges Mr. Busby with, on June 20 and 21, maliciously conveying false information through the Internet claiming bombs had been placed at federal courthouses in Pittsburgh, Erie and Johnstown.
Mr. Busby was also charged with threatening U.S. Attorney David Hickton as he performed duties in his official capacity.
Busby is in custody, in Ireland, on unrelated charges.
Hickton would not speculate on a motive. "Busby does not have a connection to Pittsburgh, or the University community," he said.
According to the Irish Times newspaper, in July 2010, Mr. Busby, then 61 years old, was convicted of emailing two false bomb threats in 2006 to Heathrow Airport in London. Those threats, which cited specific international flights, claimed to be from the Scottish National Liberation Army, according to the Times.
Federal authorities also charged Brett Hudson, 26, of Hillsboro, Ohio and Alexander Waterland, 24, of Loveland, Ohio with engaging in a conspiracy against Pitt using interstate threats claiming they were associates of the computer hacking group Anonymous.
University President Mark Nordenberg conceded today the "bomb threats may have hampered the recruitment of students."