FORT COLLINS, Colo. (CBS4) – CBS4 has learned a woman found dead in a Fort Collins lake drowned, but she had significant injuries.

The coroner is calling it a homicide.

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23-year-old Heather Hoffman was found in Sheldon Lake.

Heather Helena Hoffmann (credit: Fort Collins Police Services)

Prosecutors have charged Jeffrey Etheridge with her murder, kidnapping, sexual assault and tampering with a body.

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Jeffrey Etheridge (credit: Fort Collins Police Services)

He is a registered sex offender and homeless.

Hoffman frequently walked home through the park from her job at McDonald’s.

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She was still in her uniform when she was found.