missing, and to identify and collect the dead. [ speaking foreign language ] >> reporter: we meet araseldaher 17-year-old son was killed last night, alexis. just two months ago one of her other sons was murdered by the gang. at which point she says she applied for asylum in america for her family. she's still waiting for a response. [ speaking foreign language ] coming up, she invites us to her son's wake where we are completely unprepared for what happens next. [ gunfire ] >> reporter: and we'll meet a teenager who escaped the gangs by fleeing to america where he's now fighting to stay. >> this special edition of "nightline" will be right back. dad, you can just drop me off right here. oh no, i'll take you up to the front of the school. that's where your friends are. seriously, it's, it's really fine. you don't want to be seen with your dad? no, it's..no.. this about a boy? dad! stop, please. oh, there's tracy. what! [ horn honking ] [ forward collision warning ] [ car braking ] bye dad! it brakes when you don't. forward collision warning and autonomous emergency braking. available on the