Next airing Tue Jan 31, 5 p.m. ET

Gang Task Force

Agents apprehend an alleged Miami gang member and turn him into an informant, while a patrol on Florida's highways is on the lookout for smuggling vans packed with illegal immigrants. Then, undercover agents raid a marijuana grow house, and the U.S. Coast Guard intercepts a boat carrying over 500 lbs. of cocaine and a mystery substance that leaves the DEA baffled.