A 9-year-old girl from Texas who has been missing for several years has been found safe. The National Center for Missing & Exploited Children reports that Mariah Martinez was found Monday night. Mariah went missing in 2016. She was featured on "Live PD" on A&E on Friday, the National Center for Missing & Exploited Children received a tip. They then worked with the Lubbock Police Department and New Mexico State Police to track her down.