Alleged financial conman R. Allen Stanford may have bigger troubles than the SEC: According to ABC News, the FBI is investigating his ties to Mexico’s Gulf Cartel, the most violent gang in Mexico. Authorities tell ABC that Mexican authorities have detained one of Stanford’s private planes and found checks connected to the Gulf Cartel. Another lawyer tells ABC that the charges against Stanford have been a long time coming. "There's no surprise at all," said Washington lawyer and IRS consultant Jack Blum. "This man has been on law enforcement's radar screen for the better part of 10 years."