Secret Service agents over the weekend arrested a woman at a Käne'ohe address for allegedly threatening to kill first lady Michelle Obama.

The woman, Kristy Lee Roshia, has a long history of making threatening and rambling telephone calls to the Secret Service office in Boston, according to an affidavit filed today in federal court here.

On Nov. 9, the Boston Secret Service office received a letter from Roshia, mailed from Hawai'i and carrying a return address on Hamakua Drive in Kailua, that contained numerous photographs of Roshia along with poems and "rambling love letters" to a nonexistent Secret Service agent, the sworn affidavit said.

The following day, Roshia called the Boston office and told a receptionist "I will kill Michelle Obama" and "I will kill Marines," according to the affidavit, signed by Secret Service Special Agent John Woodruff.

She repeated the threat to an agent in the same phone call and also threatened to kill the agent, according to the affidavit.

On Nov. 10, agents informed Käne'ohe Marine Corps Base officials of the threats and law enforcement agents here began investigating the matter, Woodruff said in his affidavit.

On Dec. 19, Woodruff and two other agents interviewed Roshia at a Käne'ohe Bay Drive residential address. She said she had traveled to Hawai'i in September "to protect Obama" and since then has been "working the golf course at the Marine Base," according to the affidavit.

She told the agents that she knew "the exact location" where President Obama and his family will stay during their Christmas vacation here, according to the affidavit.

That information was "consistent" with the itinerary of the Obama family at the Secret Service office here, Woodruff wrote.

Roshia told the agents she had "visited this specific location " — believed to be the same Kailua Beach home where the Obamas have previously stayed — and "saw Secret Service agents around."

Agents then arrested her for threatening the first lady.

While in custody at the Honolulu field office of the Secret Service, Roshia allegedly "lunged at and assaulted" an agent by "striking him in the arms and face," Woodruff said in the affidavit.

"Roshia further claimed that she would 'blow away the whole Oval Office,' " the affidavit said.

National federal court records show that a woman named Kristy Roshia was arrested in Tewksbury, Mass., in November 2007 on a Washington, D.C., charge of threatening bodily harm. She pleaded guilty to the charge in July 2007 and was placed on two years' probation.

According to Woodruff's affidavit, Roshia appeared at Secret Service headquarters in Washington, D.C., in May 2007 and threatened to kill an agent there as well as "any woman that got in her (Roshia's) way."