What was he arrested for? The officer would must have found some evidence of a crime when he searched through his stuff. The police only need reasonable suspicion to pull you over which is a much lower standard than probable cause. Any violation of the motor vehicle code such as going one mile per hour over the speed limit or touching the centerline will suffice. They do not have to tell you the reason why they pulled you over, but they will in court if you contest it. The police cannot search your person, your property, or the vehicle without either permission or probable cause. An experienced criminal defense attorney would have to thoroughly review the police report and any cruiser cam videos to determine if there were any Fourth Amendment violations. Contrary to popular myth, Miranda warnings do not have to be given every time you are arrested. They only have to be given to you if you are under arrest or otherwise not free to leave in police custody and the police wish to interrogate you or ask you incriminating questions. A Miranda violation will only suppress incriminating statements and will never ever invalidate an otherwise unlawful arrest. The police can also order anyone out of the vehicle for any reason. The Supreme Court has stated the officer does not have to give a reason as officer safety is sufficient. However, keep in mind that no one ever has to speak to the police under any circumstances and you should always refuse and never consent to any searches. If you believe the cops have violated you're right, contest it in court and do not risk getting resisting obstructing charges by arguing with the police officer. Again, make sure your fiance is represented by experience criminal defense attorney.
Answered on Nov 13th, 2013 at 7:10 PM