I remember seeing/reading about these vans a while back. They are used in the ports etc for human trafficking. They are special ordered/sound proofed and I think it was from a automotive Plant in Georgia (could be totally wrong). I also think it has drains on the floor to wash blood out. Basically people bid on the humans (usually young girls) and they are drugged and delivered or transported out. I think there is usually a railway yard close also.