The Norwalk Police Department announced Monday that it had arrested Margaret Anderson after being made aware last week of a “potential threat” to Oviatt Elementary School, located in Norwalk, Iowa. In a release, the department said that Atwood has been charged with a “Threat of Terrorism” under Iowa Code 708A.5, and had been processed into the Warren County Jail.

Anderson is a 19-year-old female who identifies as a transgender man, Warren County Attorney Doug Eichholz confirmed to The Daily Wire on Tuesday. The police department said on Monday that Margaret also went by Maxwell, raising initial suspicions that gender identity was at play in the case.

Eichholz said that the case arose out of statements that Anderson made to her therapist during the course of her “regular treatment.” The therapist then reported the statements to the Des Moines Police Department, he said, which forwarded the information to the Norwalk Police Department in her hometown.