Does having your concealed carry license give probable cause for a search of your car?

My friend and her boyfriend got pulled over and told the cop that they had their concealed carry license (but did not have their weapons on them). They were asked if they had drugs and replied no. The cop asked if he could search the car and the owner refused. Another cop arrived with his k9 and proceeded to walk the dog around the car. Keep in mind, my friend's two dogs were in the vehicle. They said the drug dog signaled. Then the cop drew his firearm and said "having their concealed carry makes them a dangerous person". They physically searched the car and found cocaine (less than a gram) and a joint. The cocaine was neither of theirs. It was dropped by a guy they gave a ride to earlier that day. They were told because they were in a drug area gave them probable cause for them to be pulled over (but they were just using the hiking trail at the park).