The problem here is probably the criminal lied about what was in the cargo container, and to process the tens of thousands of titles to ship new vehicles to manufacturers is obscene - and even then, criminals will still find ways to transport cars in shipping containers.
At the end of the day, it’s up to the ports (which again are a federal agency) to scrutinize cargo containers destined for these locations - which they don’t have the staffing or funds to do.