Hard to believe this, but guess its possible..

Human Smuggler Admits to Transportation Conspiracy Involving Chinese Nationals

A particular tactic was to select a tractor trailer parked at a South Texas truck stop with a suitable temperature. They would then remove the seal and load the illegal aliens. Members of the organization would follow the vehicle to the next stop somewhere north of the checkpoint to later retrieve them. The drivers would be unaware of their human cargo and were potentially exposed to criminal liability. The aliens were then be transported in closed Penske trucks to Houston.

https://www.justice.gov/usao-sdtx/pr/human-smuggler-admits-transportation-conspiracy-involving-chinese-nationals