city upside down, to find my child. >> reporter: russell barnes drove from the south of baltimore, scouring the streets for his daughter charlotte area to visit with her sisters for the holidays. the fbi and police have searched. her mother was here, too. >> if she's alive, she's scared to death. >> reporter: phylicia was last seen at her sister's apartment three days after christmas. she posted a note on facebook, that she was there with her sister's boyfriend. police say several people who visited the apartment, are persons of interest. just 16 years old, phylicia was a straight-a student. graduating a year early, planning on attending college in baltimore. back home in north carolina, her classmates are stunned, hoping for any good news. at phylicia's charter school, students are holding on to hope. >> we just thank you in advance for bringing her home safely. >> our greatest hope is she can walk in the door and be reunited with her family. >> somebody knows where she's at. and i'm telling you, god's going to get you. >> reporter: for "good morning america," david kerley, abc news. >>> in arizona, a second patient d