MT. LEBANON, Pa. (WPXI) – Mt. Lebanon police are asking for help finding a missing 18-year-old woman. Police said Mariela Lopez Escalante was last seen July 19 at a foster care home. Escalante came to the United States at age 17, was placed in foster care and is a ward of the state. If you have any information on her whereabouts, you’re asked to call 911 immediately.