District Judge Jeffrey Viken sentenced Ryan Lee Balster this afternoon.
According to the factual basis statement, Balster began sending text messages to a 15-year old girl ... who then turned the phone over to her father.
That court document says Balster continued by sending a sexually explicit picture ... and that's when the police were called.
Balster was later arrested after agreeing to meet up with what he thought was a different 15-year-old girl who was actually an undercover agent.
He was already a registered sex offender.