PORTLAND — Police say a former Beaverton School District teacher wanted on child pornography charges has been arrested after his flight from Amsterdam landed in Portland.

The suspect, 35-year-old Logan Storm, was indicted in August after images of child pornography were discovered on his computer. He was booked Saturday in the county jail on 30 charges of encouraging child sexual abuse.

The Oregonian newspaper reported that court papers show the police investigation started last summer when Storm’s girlfriend discovered pornographic images on his laptop computer showing girls 8 to 11 years old having sex with men.

Investigators believe that Storm fled the United States shortly after the images were discovered and may have been in Canada and Ireland. He had taught mathematics in a middle school since 2005.