financial gain. >> u.s. customs agent hillary walker joined the investigation. >> the company hired a private investigation firm and they came down with two employees who were continuously stealing during the course of their investigation. we started doing surveillance on those two particular individuals. >> the employees were watched for more than two months. it appears they stole everything from liquor to toiletry items while they were stocking the first-class cabin. >> when they take the old carts off and the garbage, they would actually take liquor, unopened bottles and hide them in garbage bags or other containers, in the truck, either in a battery container or another metal box under the truck. >> the thieves would drive the company trucks back to the parking lot area, but then walk around them to see if anyone was watching them. >> they were very cautious or thought they were being cautious by looking at the vehicles that surrounded them and doing these walks almost every time. every time they pulled in. >> the investigators watched as