ALAMEDA (CBS/AP) — Investigators say a woman shot and killed her boyfriend as he slept inside a Northern California apartment and then called police and waited at the scene for officers to arrest her.

The Oakland Tribune reports (http://bayareane.ws/1lpE1C4 ) Alameda County prosecutors on Monday charged 54-year-old Donna Marie Qualls with murder in the slaying of 73-year-old Emmanuel Emmett Christy Sr.

Alameda police officers on Thursday found Christy dead with a single gunshot wound to his head in the bedroom of an Alameda apartment.

Alameda police Lt. Jill Ottaviano says it's very unusual to have a case where someone calls and says they have killed someone and then wait at the scene.

Investigators declined to comment on a motive in the case.

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