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Opening. i think it was very, you know, instrumental to get us to where we are at this point. >> reporter: authorities have not confirmed this is petitos petitos body was found under a small grove of trees on sunday. memorials continue to grow in florida and the wyoming countryside where a single cross of river rocks sits as a silent reminder of a young woman taken from her family far too soon. after the autopsy confirmed the body was petito laundries parents released a statement saying may gabb...

Searching with side scanning sonar to find likely wreckage locations, and then drop underwater vehicles down to search him. dropping a diver down at 140 feet is dangerous to begin with but the bottom time for the diver, if its a scuba diver s very limited. theyve got to get underwater vehicles down on probable wreckage results from the sonar scanning. if they cant do that its going to be a very drawn-out affair. >> david, give us some perspective. how much longer can the victims and the plane re...