i am very sad because he is dead," his mother said in an interview with univision. she asked his body be sent back to guatemala as soon as possible. his is the second death of a detained migrant child this month. the first prompted outrage on capitol hill. >> i'm asking you to promise that there won't be another death under your watch. >> you have my commitment to ensure that all of our detention centers take good care of those in our care. >> reporter: this week department of homeland security seceretary kirstjen nielsen announced across-the-board health screenings for all children in border patrol custody. she's expected to visit facilities in el paso tomorrow. >> we shouldn't have had to wait until two children died in government custody for the government to begin to act. it should have never happened. >> reporter: dylan corbett helps migrants seek asylum to find a place to stay until they're able to connect with relatives in the united states. his nonprofit other ands here have been swamped by more than 1,000 migrants who have been unexpectedly dropped off by b