When it comes to the police searching vehicles for weed, it’s very important the facts are clearly understood. A police officer cannot stop and search a vehicle without a warrant or probable cause to support the need to search the vehicle. This means that a police officer cannot just search a vehicle because he/she feels like doing so. The officer has to establish probable cause either by sight or by smell. The majority of people are not aware of this and they become victims of unnecessary shakedowns at the hands of police officers.