Drug money has a way of sprawling. And some of it may have reached Bank of America.A federal probe into Los Zetas, a Mexican drug cartel, claims that the group has been laundering money through accounts at BofA, according to a recent report in The Wall Street Journal.An FBI affidavit filed in Texas last month says that the Mexican drug cartel has been reportedly funneling cash through a Texas-based racehorse business with BofA accounts.