The records describe an FBI investigation that began after an undercover Australian law enforcement officer encountered a message Chacon allegedly posted in an encrypted group chat. The chat was focused on child sexual abuse material, court documents say. Chacon allegedly wrote that he was a teacher and later sent the officer five videos that investigators identified as illegal material.

Authorities traced the online account to Chacon using his phone number and Instagram account, according to the records. FBI agents began surveillance in Phoenix and photographed him outside his home on Oct. 7, the day district officials say they learned of his arrest.

After his arrest, Chacon told investigators he had belonged to the group for a long time and had sent such material from his phone about five or six times, court documents say. He denied having physical contact with any child or taking photographs or videos of children, including students in his classroom. The allegations have not been proven in court.

Chacon was in his third year teaching third grade at Encanto. The district placed him on administrative leave, barred him from district technology and buildings, and reported the matter to the Arizona State Board of Education, according to a statement from Osborn School District.

District officials met with families at the school Wednesday night. One parent said families left without answers about whether students’ photographs were connected to the investigation. The parent said Chacon had taken pictures of children in the classroom and described feeling betrayed by someone entrusted with their child’s care.

The district said law enforcement had told administrators it had no information linking Osborn students to the reported criminal conduct. It said it is cooperating with investigators and taking steps to protect students’ safety and emotional well-being.

Chacon was scheduled to return to court Friday. The investigation remains ongoing.