LAKEPORT, Calif. – Police have arrested a Lakeport man for allegedly sexually abusing his girlfriend's young daughter over a period of two years.

Alfonso Avalos-Chavez, 42, was arrested on Thursday afternoon on 15 counts of lewd or lascivious acts with a child under 14 years of age, as well as 10 counts of oral copulation, according to Lt. Jason Ferguson of the Lakeport Police Department.

Ferguson said that last Sunday, shortly before 9 p.m., Lakeport Police responded to the Sutter Lakeside Emergency Room where they met with a 9-year-old Lakeport girl and her foster mother, who reported the child was being sexually abused by her biological mother’s boyfriend.

Officers responded and conducted an interview with the 9-year-old victim, Ferguson said.

Based on that interview, Ferguson said the officers believed there was sufficient probable cause that the girl was the victim of lewd or lascivious acts and oral copulation by her mother’s boyfriend dating back two years.

During the course of the investigation, officers were able to positively identify the suspect as being Avalos-Chavez, leading to his arrest later this week, Ferguson said.

Avalos-Chavez was transported to the Hill Road Jail where bail was set at $200,000. Jail records show that Avalos-Chavez remained in custody on Friday, with a no-bail immigration hold placed against him.

He's due to appear in court on Monday, according to his booking sheet.

The investigation is ongoing and anyone with information is asked to contact Officer Gary Basor at the Lakeport Police Department, 707-263-5491.