Well, if they did try to punish anyone at the company, it would turn into the trial of the century. Swift would read every document at ICE into evidence, and the lawyers would rehash every communication between the government and company officials. All you would need is Judge Ito...
That was the Tyson trial. The jury said not guilty.
The Justice Dept spent 4 years preparing that case and threw everything they had at Tyson. The jury said that if fedguv can't determine who is legal and who is illegal, how can Tyson?