turning now to a disturbing new nbc exclusive report alleging horrific treatment of migrant children by customs and border patrol protection. and this time at an arizona detention center. the reports include a previously unreported allegation of sexual assault on a 15-year-old girl by a uniformed officer. the 15-year-old alleges that an officer told her to lift up her shirt. she says he pulled her pants down and touched her waist and pulled her underwear. and asked her to spread her leg and is arms and patting her down groping her body, laughing, speaking english with other officers. joining me now is the team who broke this story originally on the rachel maddow show. they ve been working on it for quite some time to get this. jacob, first to you, tell us