ARLINGTON — A student is facing a felony charge after allegedly threatening to blow up Arlington High School in September.

The 19-year-old has been expelled from school.

The teen reportedly left a voice mail message, saying he wanted to file a complaint. He became more agitated and angry in the message. He threatened to cut the throats of staff and blow up the building with dynamite, Snohomish County deputy prosecutor Bob Langbehn wrote.

The principal and school resource officer were able to quickly identify the teen’s voice.

A special education specialist met the student when he came to school. He attended special education classes.

The defendant reportedly admitted to making the threats and went into more detail about his desire to shoot his teacher and light the school on fire

“The defendant has a history of damaging property, assaultive behavior, and other incidents,” which led those who heard the message to believe he might carry out the threats, Langbehn wrote.

The teen was banned from being on school property and told not to call anymore. He left another message late last month, threatening the principal, court papers say.

The teen doesn’t have any prior criminal convictions. He has a pending case in Marysville Municipal Court for an incident at school.