(CNN) A 48-year-old man in Alaska has been charged with murder after authorities said an SD card found on the street contained videos and pictures of him killing a woman.

The woman shown being killed is Kathleen J. Henry, 30, Anchorage Police said Thursday. But they declined to comment further or provide additional details.

On September 30, a woman called police in Anchorage with a horrifying discovery.

She said she had found an SD card containing pictures and videos of another woman being strangled, beaten and raped, according to an affidavit of the criminal complaint. The SD card was labeled "homicide at midtown Marriott," authorities said.

Detectives with the Anchorage Police Department opened an investigation, police said , and began reviewing the 39 photos and 12 videos found on the memory card.

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