This has been dug extensively, and what was found is that Andrew Weissman wrongly convicted many at Enron, using the same shitty tactics they are using against Manfort and others like solitary confinement without trial to put pressure on them.
Crooked Wiessman should have been disbarred after Enron for withholding exculpatory evidence and inventing crimes, but instead he was given a job at the Obama DOJ.