A lawyer for relatives of some Newtown school massacre victims has asked the Connecticut Supreme Court to reinstate a lawsuit against gun maker Remington Arms, saying a rifle made by the company and used in the shooting was too unsafe to sell to the public.

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Justices are scheduled to hear arguments Tuesday in an appeal by a survivor and relatives of nine people killed in the shooting.

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David Studdert, a Stanford law professor, said on Monday he thought negligent entrustment was a tough argument for the families to make because it has traditionally involved someone having direct knowledge that another person poses a risk.