Updated 3:48 p.m.

A Portland man riding a TriMet bus erupted in a violent frenzy, beating a woman bloody with his skateboard and his fists, authorities allege.

The reason? She had the nerve to ask him to stop swearing and yelling at the driver, according to police and prosecutors.

Dustin Allen Wood, 40, faces multiple criminal counts in the brutal attack that landed Robin Wilson, 39, in the hospital with a deep gash to her forehead and a swollen eye, cops and court documents allege.

A Multnomah County grand jury on Thursday indicted Wood on charges of felony first-degree assault, a Measure 11 crime, as well as unlawful use of a weapon and interfering with public transportation.

Wood pleaded not guilty to all counts Friday, court records show.

Dustin Allen Wood

According to police and court documents, Wood went berserk almost immediately after he boarded a No. 75 bus on Southeast Caesar Chavez Boulevard near Belmont Street just before 9:30 p.m. on Oct. 9.

After watching the man relentlessly berate the driver over bus fare, Wilson asked him to knock it off, court records show.

“The next thing she knew she was bleeding all over the place and passengers were telling her she was struck with a skateboard,” a probable cause affidavit alleges.

Court records also claim Wood, who is 6-foot-1 and 210 pounds, punched the woman in the face. He then got off the bus, walked south along Caesar Chavez and eventually caught the next northbound No. 75, police said.

When the bus now carrying Wood arrived at the stop where the alleged beatdown occurred, passengers from the first No. 75 — now spattered with blood and out of service — got on board and recognized him, police said.

Officers arrested Wood, who still had his skateboard with him. He remains behind bars in the Multnomah County jail, records show.

Wood has multiple felony convictions and listed his current address as the Wy’East shelter in Southeast Portland, according to jail records. He also told jail intake staff that he suffers from bipolar and attention-deficit disorder.

-- Shane Dixon Kavanaugh; 503-294-7632

Email at skavanaugh@oregonian.com

Follow on Twitter @shanedkavanaugh

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