An Oak Harbor man is facing felony charges for allegedly beating children with some sort of cord and leaving welt marks on their bodies, according to court documents.

Prosecutors charged Alonzo R. Boyles, 37, Feb. 7 in Island County Superior Court with two counts of assault of a child in the third degree.

Oak Harbor police officer Manuel Silveira investigated the case after a counselor at the Coupeville Middle School reported on Feb. 5 that a 12-year-old girl had welts on her arm.

The girl allegedly reported that Boyles whipped her and her 11-year-old brother with an extension cord because they had bad grades on their report cards, Silveira wrote.

The girl had “severe red welts” on her arms, shoulder and buttocks, according to the report.

The boy also had a welt mark on his forearm, but he refused to allow investigators to see the rest of his body, the report states.

The four children were placed into protective custody by the Department of Social and Health Services.

Boyles admitted to police that he “whooped” the children for failing grades, but he said he used a “thin pink braided belt,” the report states.

If convicted of the charges against him, Boyles could face from three to eight months in jail under the standard sentencing range.