Andrea Maccagli faces charges after threatening her grandmother with a knife during a domestic dispute, Fallsburgh police say.
Officers responded to a report at Maccagli's Woodbourne home last week.
Upon arrival, Maccagli locked herself in a bedroom. Officers forced entry and arrested her.
Maccagli is charged with menacing and criminal possession of a weapon. She was arraigned in Fallsburgh Justice Court, receiving a restraining order from her grandmother, and released pending a future court appearance.