Story highlights Call center workers in Las Vegas alerted authorities to a possible assault in Oregon

A telemarketer heard muffled cries on the other end of the line and told her supervisors

Walter Ruck, 33, was arrested on assault charges

(CNN) A telemarketer making a sales call from Las Vegas helped to end a domestic violence situation 900 miles away in Oregon on Wednesday evening, according law enforcement officials.

Chamille McElroy of Americare Health & Nutrition placed a call to a woman in Lebanon, Oregon, but instead of a "hello" she heard what sounded like a violent struggle on the other end of the line.

McElroy alerted her supervisor, Tina Garcia; then her boss Mario Gonzalez, CEO of Americare, stepped in. Gonzalez says he was walking around the sales floor when one of his managers asked him to listen to a call, and what he heard was very traumatic.

Call center workers say they heard a woman screaming for her life and yelling "please don't kill me," according to a press release from the Linn County (Oregon) Sheriff's Office.

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