Legal Question in Criminal Law in Arizona

It could be considered reasonable cause to request a breathalyzer. Generally, the issue here becomes whether the person consents to the breathalyzer. If they don't say no then it is likely that the individual who receives the test will have been deemed to consent. If there is a refusal then there is the potential for Fourth Amendment issues. Keep in mind that in Arizona requesting that a criminal defendant submit to a breathalyzer test does not implicate the rights against self-incrimination.