One of the primary and driving factors behind an arrest made in the state of New York should be reasonable cause. Reasonable cause must be determined by the arresting officer during a period of time directly before the arrest is made. From a legal standpoint, reasonable cause can be difficult to explain, as it allows for a fair degree of interpretation on the part of law enforcement. Simply put, an officer must approach the arrest process as objectively as possible and based the decision to arrest on a solid fact or some form of physical evidence that the person or people in question are rightly suspected of having committed a crime.
In many cases officers are even tasked with presenting reasonable cause to the arrested party at the scene of the arrest. For example, if reasonable cause can only be determined by an officer with specialized training, he or she must explain to the person under arrest what that special training is and how it has resulted in the presumably lawful arrest.