As it goes, a couple with their child were in a shop in Tijuana, Mexico. With their baby only a couple of feet from them, their attention was diverted just long enough for the baby to be stolen. They searched frantically for the baby and/or the kidnappers, but had no luck. Even with the aid of the local police they had to go home empty handed.
While crossing the border back into the U.S., The wife notices her child's car seat in a car next to them waiting to go through the border check. She gets out of the car and starts to make a scene, which does indeed attract the attention of the border police. The police detain the car in question, along with its occupants. The mother is able to identify the baby as her own that was stolen earlier.
However, the people who had her had killed and disemboweled her as a hiding place for smuggling drugs into the U.S.