A Clackamas County man was sentenced to more than 16 years in prison this week for sharing pornographic photos of two young girls he knew. He also admitted to sexually abusing one of them.

Robert A. Hattabaugh, 32, pleaded guilty in January in Clackamas County Circuit Court to using a child in a display of sexually explicit conduct and first-degree sexual abuse. He was sentenced Monday and ordered to register as a sex offender.

Hattabaugh uploaded more than 30 sexually explicit photos of the two girls, who were between the ages of 5 and 10 at the time, to an online forum in May 2016, according to a sentencing memorandum from the county district attorney's office. Police in Canada were monitoring the forum, traced the uploader's IP address to Hattabaugh and forwarded the information to the Clackamas County Sheriff's Office.

Authorities served a search warrant on Hattabaugh's home and discovered he had 900 child porn photos on his computer, with all but eight pictures being of the two girls, the memo said.

The girls weren't aware that he had taken photos of them, the memo said.

-- Everton Bailey Jr.

ebailey@oregonian.com

503-221-8343; @EvertonBailey