this morning, brian laundrie is still not talking in the disappearance of his girlfriend, gabby petito, but a member of his family is finally speaking out. >> me and my family want gabby to be found safe. she's like a sister and my children love her and all i want is for her to come home safe and sound and this to be a big misunderstanding. >> reporter: laundrie's sister cassie says even she hasn't spoken to her brother since he returned to his home in florida from his and gabby's cross-country trip without gabby. >> i haven't been able to talk to him. i wish i could talk to him. i cooperated every way that i can. i wish i had information or i would give more. this is all i have. i gave it to the police. >> reporter: these body camera images show the couple days before gabby went missing. officers responding to a 911 call over an argument between the two near arches national park in utah. >> what's going on? how come you're crying? >> we've just been fighting this

allegedly misled investigators about safety issues may now face federal criminal charges. the max jet, of course, was involved in two crashes that killed nearly 350 people. >>> the crew on inspiration are having a blast. they have completed more than 15 orbits around earth since liftoff all part of a fund-raiser for st. jude. the patients got to ask the crew some questions including are there cows on the moon. i'm going to venture to say i might know the answer to that. >> i think you might. >>> we turn to the search for gabby petito. the fbi has joined the effort as gaby's parents beg for information from her boyfriend and we hear from his sister for the first time. trevor ault has the story, good morning, trevor. >> reporter: good morning, george. police have said that deafening silence from gabby's boyfriend brian laundrie is hindering their investigation and search efforts. this morning we are finally hearing from someone in his family. his sister speaking to abc news but even she...