Thirteen law professors who specialize in common-law torts have thrown their weight behind a negligent entrustment appeal lodged against the makers of the AR-15 rifle used in the Sandy Hook school shooting.

Their 35-page amicus brief filed with the Connecticut Supreme Court Monday focuses on how negligent entrustment should apply to Remington and Bushmaster Firearms, the makers of the AR-15 rifle used in the massacre. The brief was submitted in an appeal to the state Supreme Court filed by attorneys representing some of the families of students and educators killed.