The Police Department filed charges against a 13-year-old Waltham resident in connection with the September threats against McDevitt Middle School.
The police charged the teen with disorderly conduct, criminal harassment, threat to commit a crime, intimidation/obstruction of justice and bomb/hijack threat with serious public alarm.
The Police Department, which filed the charges on Sept. 20, declined to provide further details because the suspect is a minor.
The charges stem from a shooting threat targeting McDevitt Middle School, one of two public middle schools in the city.
The threats, which were posted and circulated via social media app Snapchat, were first reported on Saturday, Sept. 14, just three weeks into the new school year.
The next day, Sunday, Sept. 15, school officials alerted students and their families to the threats, and in public statements detailed the additional safety measures they implemented in all the city’s schools as classes resumed that Monday, Sept. 16.
Those measures included placing a police officer on every floor at McDevitt and increasing patrols around all schools. Additionally, McDevitt students were asked not to bring backpacks to school.
That night Waltham Police Chief Kevin O’Connell and school Superintendent Marisa Mendonsa announced that they had identified the source of the threat and that “the threat was determined to be non-credible and there is no evidence of a shooting being planned or attempted.”