It took five years for the government to decide to halt its securities fraud prosecution of international financier Benjamin Wey. But for his attorney, Haynes and Boone partner David Siegal, the problems with the feds' case were baked-in from the start.

“We always were troubled by the face of the warrant,” Siegal said.

Earlier this week, those problems metastasized. Federal prosecutors from the Southern District of New York filed a nolle prosequi notice with U.S. District Judge Alison Nathan, alerting her that, thanks to an earlier sweeping evidence suppression order, they were no longer able to pursue their case against Wey.