and she didn't deserve for this to happen to her. >> reporter: but tonight, a stunning twist. authorities saying it was all an act. keith and valeria smith now under arrest, taken into custody in texas near the mexican border, accused of spinning a web of lies. >> people took advantage of baltimore, and what we want to make sure is that the truth comes out and justice is done. >> reporter: david, keith and valeria smith have been charged with first degree murder. they will be extradited to maryland and have not yet entered a plea. david? >> erielle, thank you. overseas tonight, the vacation in africa ending in tragedy. four americans taking off in a helicopter from a national park in kenya crashing on an island, killing all of them and their kenyan pilot. the u.s. embassy confirming the names of three of those americans, anders burke, brandon stapper and kyle forti. and from northern california tonight, the miracle survival of two little girls, sisters just 5 and 8, they spent nearly 48