Gregory Lee Giusti, 48, was arrested Wednesday at his San Francisco home, said Joseph Schadler, spokesman for the FBI's San Francisco office. Schadler would not disclose the charges against Giusti, saying they were under seal until his first appearance before a federal magistrate, scheduled for Thursday.
The threats involving Pelosi made drew increased attention on the vicious verbal attacks that other Democratic legislators have faced over their support of the health care overhaul. The arrest came a day after a Washington state man was arrested for allegedly leaving threatening voicemails for U.S. Sen. Patty Murray.
Several federal officials said Giusti made dozens of calls to Pelosi's homes in California and Washington, as well as to her husband's business office. They said he recited her home address and said if she wanted to see it again, she would not support the health care overhaul bill that since has been enacted.
One official said the man is believed to have spoken directly with Pelosi at least once.
The officials spoke on condition of anonymity because they were not authorized to discuss the case publicly.
Giusti has been in trouble previously for making threats. In 2004, he pleaded no contest in San Mateo County, just south of San Francisco, to a felony charge of making criminal threats and was sentenced to a year in jail and three years of supervised probation.
The 2004 arrest occurred on a commuter train after Giusti was kicked off for not paying his fare, Steve Wagstaffe, chief deputy district attorney for San Mateo County, said. Giusti became enraged, started screaming and threatened to kill the conductor, who called in the sheriff, Wagstaffe said.
A statement from Pelosi's spokesman Wednesday praised the efforts of law enforcement and said the House Speaker would have no further comment "at this time."
On Tuesday, Pelosi told reporters in San Francisco that "people have been active in expressing their disagreement." Sometimes those expressions have risen "to the level of threats or violence," she said, explaining that she was not allowed to comment on her own situation.
Rose Riggs, a neighbor of Giusti in a public housing complex in the city's Tenderloin district, said she saw two plainclothes and two uniformed officers take him away in zip-tie cuffs. Riggs, 62, said Giusti was known for engaging in heated political debates with others in the building.
"He was not one of my favorite people. He had a real attitude problem," she said.
Neighbor Greg Little, 53, said he also saw officers take Giusti away.
"He was real quiet when they took him out. He wasn't combative," Little said.
Sister Lorna Walsh, community operations manager of the Mercy Housing complex where Giusti lives, said he had lived in the subsidized housing for almost 10 years. She would not comment further.
On Tuesday, federal authorities in Washington state announced charges against Charles Alan Wilson, 63, for allegedly made threatening calls to Murray. Officials said he left voicemails for the senator, including ones in which he's accused of saying "there's a target on your back now" and "it only takes one piece of lead."
Charges also have been filed against a Philadelphia man who allegedly made a YouTube video threatening Rep. Eric Cantor, R-Va.
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Barrett contributed to this report from Washington. Marcus Wohlsen and Juliana Barbassa in San Francisco also contributed to this report.
