Charges filed in girl's '99 killing Recent DNA evidence linked man to Irving girl found in Trinity 07/12/2002 By JENNIFER EMILY / The Dallas Morning News Late at night, when she's supposed to be sleeping, 6-year-old Tiffany Ryno plays with her twin sister, Cristy. Their mother, Leticia Ryno, isn't sure if Tiffany is dreaming or merely sharing her wish that Cristy were still alive. That wish, of course, will never come true. But Thursday, another one did. CRISTY RYNO SLAYING April 17, 1999: Three-year-old Cristy Ryno is missing when her mother wakes up in her Irving apartment. April 21,...