. ♪ >>> surveillance video captured stealing a shark from the san antonio aquerium.seen casing the aquerium. when minutes later a man sticks shs hand in the tank and grabs the ark. he disguised the shark as a baby in a strollerer. one suspect is under arrest but heid make it all the way wham the shark. h apparent already had an aquarium ready waiting. >> i would think the shark a wouldn't be to live out of the waterer for that long. did.ently it he wanted that shark. >> he did. i can't imagine that conversation to get the other two people involved. >> and somebody had a stroller. so they're taking it from their own baby. >>> a warning from an olympic star and his wife. they're opening up for the first time since the tragic drowning of tir infant daughter. speaking out to savannah guthrie about an unimaginable loss hoping their message can help save the lives of other children. >> she had no- fear >> reporter: it's been seven weeks since they lost their precious baby girl, emmy. her room sits untouched. >> whyid you want to get the word out? >> i think it does i somea