Monday, December 23, 2002 Clue Could Help Solve Killings By Jeff Jones Journal Staff Writer The Bernalillo County Sheriff's Department says it has tracked down what might be another important clue in the unsolved 1999 East Mountains triple killings. The possible weapon — an AK-47 assault rifle — was probably altered so that it had a much more distinctive look than a standard AK-47, said sheriff's Sgt. Gregg Marcantel. He heads the task force looking into the deaths of teenage friends Kevin Shirley, Luis Garcia and Matt Hunt. Investigators have reconstructed a gun that they believe looks...