A Kalispell woman has pleaded not guilty to assault after allegedly setting her boyfriend’s truck on fire and attacking him with a knife.

Jonee O’Brien, 33, entered the plea March 13 in Flathead District Court.

O’Brien allegedly entered the victim’s home from the garage and told him “he might want to check on his truck because she had set it on fire,” according to charging documents.

The victim ran out to the garage, where he found his front passenger seat on fire. He put the flames out with a fire extinguisher.

When the victim re-entered his home to confront O’Brien, she allegedly brandished a knife and “came at him.”

The boyfriend was not injured and O’Brien was taken into custody by law enforcement. A Flathead County deputy later found the knife in the home and confiscated it.

The court document also states O’Brien has a history of mental illness and chemical dependency and she has a pending case in Kalispell Municipal Court in which the city would be filing to revoke her release.

If convicted, O’Brien faces up to 20 years in the Montana State Prison and a fine of up to $50,000.

Her next hearing is set for April 9.