CLAREMONT — Police are investigating a middle school teacher for having an “inappropriate relationship” with a 14-year-old former student.

Erin Mullen, 38, was fired from her job at Claremont Middle School after she was arrested and charged with violating a protective order to stay away from the former student, Chris Pratt, superintendent of SAU6 announced in an email to parents on Monday morning.

Mullen, of Springfield, Vt., and a 2004 graduate of Lebanon High School, was arrested last Wednesday afternoon at the Claremont Savings Bank Community Center on South Street.

The arrest took place less than an hour after she had been served with a stalking/temporary order of protection sought earlier in the day to stay away from the juvenile with whom she made contact inside the community center, according to court documents.

Mullen, who was still listed as a social studies teacher on the Claremont Middle School website on Monday afternoon, was arrested and subsequently transferred to Sullivan County House of Corrections in lieu of bail, Claremont police said in a news release on Monday.

She has pleaded not guilty to charges of stalking and violation of a protective order, both misdemeanors, according to court documents.

Mullen could not be reached for comment on Monday afternoon. Court documents show that she was initially representing herself and do not list an attorney.

Pratt, in a subsequent email to parents responding to “many inquiries” on Monday, said that he could “not share specific details” about what led to the firing of Mullen — whom he did not identify by name — but said that the school district “acted swiftly and promptly as soon as were notified by law enforcement that the law had been broken.”

Pratt said he was also submitting “the teacher’s name” to have the New Hampshire state teacher’s license revoked.

Although school officials provided no details about the teacher’s dismissal, a two-and-a-half page statement in support of the stalking order sought by the juvenile’s mother against Mullen said that Mullen was the student’s 7th grade teacher during the 2023-2024 school year and developed an “unhealthy obsession” with him.

The petition said that last summer the juvenile spent a “great deal of time” with Mullen, who offered to take the youth “under her wing and tutor him” as the mother was working multiple jobs. Mullen took the juvenile on trips to Atlantic City and New York City without her own children, the petition said.

At the end of the summer, the juvenile was “refusing to come home” after spending multiple nights at Mullen’s residence, which led the mother to “involve the Claremont Police Department.”

When the mother sought the police’s help for the return of the juvenile, Mullen filed an “ex parte guardianship petition seeking guardianship” of the 14 year old, the mother wrote. Initially the guardianship was granted, but then when Mullen did not appear for the hearing, her petition was dismissed.

Mullen filed a second guardianship petition, but at the hearing on Nov. 22, 2024, Claremont police informed the court that Mullen “was being investigated for inappropriate sexual contact” with the juvenile.

The petition in support of the anti-stalking order also reports that Mullen had been communicating with the juvenile via Snapchat and that Claremont police are in possession of a “5-page handwritten letter” in which she refers to the juvenile as “Babes.”

Mullen’s own mother, according to the anti-stalking petition, told police and others that she was alarmed at the relationship her daughter was developing with the young teenager.

Mullen’s mother “believes that Erin is obsessed with (the juvenile) and that something inappropriate has taken place between them,” the anti-stalking petition said, and worried that Mullen is “going to mess up that kid’s mind.”

Contact John Lippman at jlippman@vnews.com.