Obviously, the robbery life of Karl, the secret services simply could not help but notice. So the FBI finally tracked down CJ-I. They settled down in places where Carl often visits. For example: Grove Street, 4 Dragons Casino, Abandoned Airport, Doherty Auto Shop, Woozy's Apartment. They hide in quite normal media vans...but if you get too close or attack them, then they will immediately put you on the federal wanted list and call for reinforcements. Agents near Woozy's apartment don't call for reinforcements until you attack them! (If you approach they will hide)