BRISTOL, Conn. -- Police have arrested a former teacher at a school for the deaf on charges that she sexually assaulted a student.

Police said Julie Denno, 27, who worked at the American School for the Deaf in West Hartford, has been charged with second-degree sexual assault and impairing the morals of a minor.

Police said the assaults occurred at Denno’s home with a 15-year-old boy.

Police said Denno’s bail was set at $75,000. She was slated to be arraigned Friday in Bristol Superior Court, police said.

Officials said Denno and her students exchanged almost 3,000 text messages, some of them explicit, during a two-month period.

Denno, who is also deaf, has since been fired, officials said.

She's been living with her parents in New York, police said, but turned herself in when she was informed a warrant was out for her arrest.