mr. giordano says he was snorkeling with ms. gardner and that the water was rough. >> that's what he told us, indeed, but it was a very calm day. there was no currents, no waves, nothing like that. >> reporter: police concluded that giordano's story was at the very least highly suspicious and in aruba, which is part of the netherlands, police can hold you just on suspicion. but giordano wasn't in custody. so police went looking for him. >> when he became a suspect and we decided to arrest him he was already in the airport. >> reporter: gary had gone to the airport and changed his ticket to take an earlier flight back to the u.s. according to police, the ticket agent asked him where his traveling companion, robyn, was. >> he claimed that she took a later flight. which is of course, odd. >> reporter: but that was not the only suspicious thing gary giordano did. police discovered gary had taken out an insurance policy on robyn gardner. a policy that would pay $1.5 million in the event of her accidental death. and the policy's benef