As far as the thread, you should fight it man. I fully encourage you too, believe it or not, good cops HATE dirty cops. They make us look bad and give normal citizens (you) a bad perspective about the police. If I worked with someone that I knew was violating someone's rights I would turn them in in a heartbeat. Dont let this put a bad taste in your mouth. For every cop that is an asshole there are 10 more who would be willing to do anything for you.
Excersise your rights and give fighting it a shot. You might not win but atleast YOU did what was right. You cant control everyone's actions, even the police
To my other boys in blue on the site.........
EDIT: Sorry that was all opinion I didnt really help with a few of your questions.
1) The reason for stopping the car sounds like garbage which makes everything I'm about to say "fruit of the poisonous tree" (which pretty much means that the evidence (fruit) found after was "poisonous" because the reason for the stop, (the tree) itself was not based on facts)
2) If they had reasonable suspicion that there were drugs or alcohol in the car the did have some basis for searching the car without consent (remember though of the poisonous tree I spoke of )
3) It sound like they cited your bro for possession of paraphernalia which atleast in my state is considered and "arrest" even if they did not take him into custody. Which in turn gives them the right to do a search incident to arrest. Some judges though do not want you to search vehicle if you are going to cite and release them.
4) The glove box misconception. You have all the right to search in a glovebox.....if it is unlocked. If it is locked your going to most likely need a search warrant. BUT for all of you who think your just going to hide your drugs and guns in your glovebox and tell the cops to pound sand when they ask to search it, drug dogs are smarter than you are and if they smell it, in most cases a search warrant is a phone call away. The bottom line is that if you got yourself in the position where your car needs to be searched....its going to get searched one way or another because if i smell marijuana in a car and ask to search and they say go for it....] but you cant look in my glovebox ,I'm going to search it eventually anyway.
Your case though really is extraordinary if what you say in fact did happen. Like I said most cops are not like that and you should not worry in the future. A tip for people though. Be cool and cooperate, it goes along way.
Hope this helps bud.