 This is a single-center, investigator-initiated study to determine the best method for analyzing the presence or absence of illicit environmental drug exposure in children placed into protective custody in Sacramento County. In collaboration with the National Institutes of Health NIH, National Institute of Drug Abuse NIDA we will use diagnostic procedures to determine the presence of illicit drugs in the following three samples: 1 hair; 2 oral swab; and 3 urine. These samples will be sent to a designated NIH lab site where 100 de-identified samples will be analyzed for methamphetamine, amphetamine, Ecstasy MDMA, and MDEA. 