A photograph of Grace Wangari Thuiya, a 24-year-old beautician who was killed in Nairobi, Kenya, in January. Her boyfriend assaulted and repeatedly stabbed her, police told her mother. Credit... Natalia Jidovanu for The New York Times

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Persons: Grace Wangari Thuiya, Natalia Jidovanu Organizations: The New York Locations: Nairobi, Kenya