Close Elizabeth Thomas' father speaks out 15-year-old Elizabeth Thomas has been missing since Monday. Since then, officials have issued an Amber Alert. Now her father is asking for the public's help in finding her. WBIR 11:13 PM. EDT March 18, 2017 TRENDING VIDEOS WBIR Breaking News TBI search continues for Elizabeth Thomas Grandmother indicted on murder charges Deal Guy: $35 WiFi Streaming Camera Knox Co. murder cast to grand jury ETSU Black Lives Matter protester indicted Five dead and many injured in London attack Lane Kiffin video inspires East TN spoofs Pet store bill stirs controvery Storms bring rain, hail and high winds More Stories Amber Alert: Thomas family asks for continued prayers Mar 14, 2017, 5:45 p.m. Police identify London attacker as Khalid Masood Mar 23, 2017, 11:43 a.m. Man indicted for murdering his Knox County parents Mar 23, 2017, 10:34 a.m.