A 41-year-old man was indicted Thursday on charges related to an attack last week on a Portland police officer overseeing sex offender registrations inside a police precinct.

Noah J. Wilson pleaded not guilty in Multnomah County Circuit Court to first-degree assault and assaulting a public safety officer. He is accused of knocking Officer Bridget Sickon down and beating her in the head and face on Oct. 17 in a community room at the police bureau's southeast precinct.

Wilson remains held Thursday in the Multnomah County Detention Center since his arrest on the day Sickon was attacked.

According to a probable cause affidavit, one of Sickon's fingers was broken in three places from the attack, she had symptoms of a concussion and had pain in her knee and hip. The attack appeared to be unprovoked and was stopped by one of Sickon's colleagues and a county worker who were nearby and held Wilson down until other officers arrested him.

As Wilson was being led away, he yelled "I put that cop on the ground," according to the affidavit. His criminal history includes a 2004 conviction in Arizona for luring a minor for sexual exploitation.

While being interviewed by court staff at the county jail, Wilson identified himself as homeless and said he'd been in Portland for five days prior to Sickon being attacked.

-- Everton Bailey Jr.

ebailey@oregonian.com

503-221-8343; @EvertonBailey