The Manorville carpenter charged with killing two women more than 20 years ago left two calling cards at each crime scene, a Suffolk prosecutor said Thursday — his DNA and wood chips.
John Bittrolff, 48, pleaded not guilty Thursday to an indictment charging him with two counts of second-degree murder in the deaths of Rita Tangredi, 31, of East Patchogue, on Nov. 2, 1993, and Colleen McNamee, 20, of Holbrook, on Jan. 30, 1994.
Assistant District Attorney Robert Biancavilla told Suffolk County Court Judge John Toomey Jr. that several things — including Bittrolff’s DNA and the wood chips — tied the crimes together and to the defendant.

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