A woman from Greece faces federal and state charges connected to guns used in the firefighter ambush slayings on Christmas Eve in Webster.

24-year-old Dawn Nguyen, who used to be a neighbor of the gunman, has been charged with a federal charge of making a false statement, and a state charge of  filing a falsified business record.

State police say the charge is connected to the purchase of a .223 Bushmaster semiautomatic rifle and a 12-gauge shotgun that the gunman, William Spengler, had with him Monday when firefighters Michael Chiapperini and Tomasz Kaczowka were gunned down.

U.S. Attorney General William Hochul says Nguyen was with Spengler when she bought the guns at Gander Mountain in Henrietta in 2010.  She said the guns were for herself.  But investigators say she was actually buying the guns for Spengler.

Spengler, who was imprisoned from 1981 to 1998 for killing his grandmother, was not allowed to own firearms.

"Dawn Nguyen told the seller of these weapons that she was to be true owner and buyer of these guns," said Hochul. "It is absolutely against federal law to provide any materially false information" on a firearms application.

 If convicted of the federal charge, Hochul says Nguyen could face up to 10 years in prison.