Prosecutors think a 27-year-old woman found dead last week outside the small Oregon community of Alsea was in a love-triangle relationship involving the man accused of killing her.

William Hargrove

Anna Alekseyevna Repkina, who's from Russia, entered the U.S. on March 1 and was shot dead less than seven weeks later, according to court records and the Benton County undersheriff. William Chase Hargrove, 27, faces a murder charge in her death.

Undersheriff Greg Ridler said Repkina was admitted into the country with a Russian passport and most recently lived in Corvallis. She was found dead last Monday on private logging land owned by Weyerhaeuser, he said.

Prosecutors believe Repkina was in an "interesting love-triangle relationship" with Hargrove and another woman, Senior Deputy District Attorney Amie Matusko told the Associated Press.

Hargrove was arrested Wednesday and is being held without bail in Benton County.

Repkina and the other woman, who was in a long-term relationship with Hargrove, were living at separate locations and Hargrove spent time with both of them, Matusko said.

The other woman "gave him an ultimatum: It was either her or the other, and he made a decision," Matusko said. "He took the victim out on a rather desolate logging road, and she was found shot in the back of the head, execution-style."

Hargrove's attorney, Mike Flinn, declined to comment to the Associated Press on Monday.

Authorities said they believe Repkina came to Oregon "for the relationship," but they are seeking more details in the case, Matusko said.

The sheriff's office asks anyone who has information about Repkina and what she was doing in Benton County to call the agency at 541-766-6858.

The sheriff's office doesn't know of any relatives of hers who live in the U.S. She didn't appear to have a job, Ridler said.

A probable cause affidavit in the case was sealed, and the next court hearing in the case is set for June 26.

— Staff and wire reports

Jim Ryan and Tony Hernandez of The Oregonian/OregonLive staff contributed to this report