Rochester N.Y.- Opening statements are set for this morning at the trial of Dawn Nguyen.

Nguyen is the woman accused of buying the guns used in the Christmas Eve 2012 ambush of West Webster firefighters. 

Prosecutors say she lied on a form at Gander Mountain in Henrietta back in 2010 when she said the firearms she was buying were for her. Prosecutors say those weapons were actually for ex-convict William Spengler.

Spengler shot and killed his sister, and two firefighters who were responding to the house fire he set. Two other firefighters were wounded as was a Greece Police Officer.

Spengler killed himself after a gunfight with police.