An Oak Harbor man described in court as “a serial child rapist” was sentenced to prison Friday.

Rafael Bowzer preyed on minor girls in Oak Harbor for years, court documents indicate. The Department of Corrections reported “unconfirmed reports” that he may have been involved with “up to 53 or more” underage girls and may have impregnated one girl.

The victims were as young as 14 years old, according to the pre-sentence investigation report by the Department of Corrections.

Bowzer, 23, pleaded guilty to four counts of rape of a child in the third degree and communicating with a minor for immoral purposes.

The judge sentenced him to five years in prison, which is the top of the sentencing range.

Bowzer previously worked as “a grade school monitor” in Massachusetts.

Detectives started looking into Bowzer after the father of a teenage girl reported that she and her 15-year-old friend were leaving in a car with him. The police stopped them and questioned why he was hanging out with underage girls.

Later, the police analyzed the younger girl’s phone and found Bowzer had sent her sexually suggestive texts.

Detectives contacted Bowzer and he admitted that he had sex with a series of underage girls, according to the police report.