(CNN) A Minneapolis police officer was charged Tuesday with third-degree murder in the death of Justine Ruszczyk, a 40-year-old Australian woman who was shot in 2017 after she called 911 to report a possible sexual assault near her home.

Officer Mohamed Noor turned himself in to authorities, said Sherral Schmidt of the Police Officers Federation of Minneapolis.

Noor is being charged with third-degree murder -- "perpetrating an eminently dangerous act and evincing a depraved mind" -- as well as second-degree manslaughter -- "culpable negligence creating unreasonable risk," according to the Hennepin County Jail website.

In July, Ruszczyk called 911 late at night to report a possible sexual assault in an alley near her home. Fewer than 30 minutes later, she was dead from a gunshot wound to the abdomen. One of the two officers who responded to the call shot the unarmed woman.

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Officer Matthew Harrity told investigators that he drove to the scene and was startled by a "loud sound" near the squad car, according to Minnesota's Bureau of Criminal Apprehension.

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