Monica Florence Aceves RESOLVED Aceves, circa 1997 Missing Since 07/24/1997 Missing From Phoenix, Arizona Classification Missing Age 19 years old Height and Weight - Distinguishing Characteristics - Details of Disappearance Aceves disappeared from Phoenix, Arizona on July 24, 1997. Her body was found west of the city in January 1998. It was identified in late 2011. Investigating Agency - Source Information Phoenix Police Department . .