Gary Oliva, a longtime person of interest in the JonBenét Ramsey case, has been called out by one of his former high school classmates — as part of a current investigative series this month by the U.S. Sun — for allegedly sending him creepy audio tapes, packages with people’s hair, news clippings of missing girls, and letters with poems and sketches of the slain child pageant star. The former classmate, Michael Vail, says he’s confident that Oliva is responsible for JonBenét’s 1996 murder, citing numerous red flags in the convicted pedophile’s life, such as a phone call he supposedly made to Vail on the day that JonBenét’s body was found, in which he reportedly told him, “I just hurt a little girl,” while sobbing…