Diana Mazariegos was 15 and from Fontana, California, when she was last seen on June 23, 2006, the day after her birthday. She left home saying she was going to school, but the school was not in session that day. Authorities classified her as an endangered runaway and believe she may have left of her own accord.

At the time she disappeared Diana had braces and a pierced lip; her hair was dyed blonde on top and brown on the bottom. She may have used the alias Melissa. Investigators have followed leads over the years; some reports say she might still be in the local area and possibly traveling in a red SUV, but her whereabouts remain unknown and the case is open.

Anyone who knew Diana, remembers seeing her, or has information about a red SUV in the area is asked to contact the Fontana Police Department.