The sister of Miriam Carey, the 34-year-old mother shot dead by police after trying to ram her car through a White House barrier said there was "no need for a gun to be used."
Speaking outside her home in Brooklyn, retired NYPD officer Valarie Carey said there was a police protocol to deal with people suffering from postnatal depression that should have been followed, and that she did not understand why her sister was shot when she was unarmed.
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Having a longer pregnancy also reduced the risk of suffering from post-natal depression, a study found.