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Nathan Lee Conner, 34, was arrested Feb. 2 after a lengthy investigation, police said.

(The Oregonian/File)

Nathan Lee Conner

Portland police have arrested a man they accuse of exposing himself and masturbating in Washington Park.

Nathan Lee Conner, 34, was arrested Tuesday after a lengthy investigation, Sgt. Pete Simpson, a Portland Police Bureau spokesman, said in a news release.

Conner, of Portland, was booked into the Multnomah County Jail pending indecent exposure, public indecency, offensive littering and first-degree criminal trespass charges.

He's facing 13 counts of each of the first three charges and a single criminal trespass charge, Simpson wrote.

Conner was released on his own recognizance Tuesday, jail booking information shows.

Portland police officers began their investigation in April 2015 after receiving reports of a man, sometimes dressed in women's clothes, who was exposing himself and masturbating in the park, Simpson wrote. Conner also left behind "evidence of an offensive nature," Simpson wrote.

Police didn't receive any reports of Conner approaching or threatening anyone during the incidents, Simpson wrote.

Conner will be arraigned Wednesday. He was identified as a suspect after police released a surveillance photo from a Northwest Portland business, Simpson wrote.

Anyone with more information about Conner or the alleged incidents is asked to email Officer Michael Bledsoe at michael.bledsoe@portlandoregon.gov.

-- Jim Ryan

jryan@oregonian.com

503-221-8005; @Jimryan015