After a 4-year-old was shot and killed in a Philadelphia home, the boyfriend of the girl's mother turned himself in, saying it was an accident.
At first, police thought the girl's 5-year-old sibling had shot her with the man's semi-automatic handgun until the mother's boyfriend confessed Saturday night.
Police have not yet released the identities of the girl or the mother's boyfriend.
Authorities are still investigating and haven't confirmed if the shooting was an accident.
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