I doubt vending on Sr could generate the kind of cash the CIA would be interested in, they were flying tonnes of coke into the US to fund the Nicaraguan Contras, they would have to be top tier and selling a shit load of drugs, think of how much effort would be involved in running that operation, nah I'm not buying it. LE selling drugs won't happen imho, they can sell fake ID's, guns and all sorts of other shit in their pursuit of the perceived bad guys but if it came out they were selling drugs it would destroy what little credibility they have.