Generally, an officer may arrest a person when that officer has reasonable cause to believe that person committed a crime, whether in the officer’s presence or not. However, for an officer to arrest a person for a non-criminal offense, the offense must be committed in the officer’s presence. There are a limited number of exceptions to this law. (See CPL § 140.10).
This issue frequently arises when an officer arrives on the scene of an accident; interviews witnesses and determines that, for example, a motorist was speeding, traveling to closely, or changed lanes unsafely and issues a ticket accordingly. However, since speeding, traveling to closely or changing lanes unsafely are all non-criminal offenses (they are traffic infractions), can the officer issue a ticket even though the offenses were not committed in his presence?
I must say, I was surprised to learn that the answer is yes. First, the law says that an officer may not arrest for a non-criminal offense not committed in his presence. It says nothing about the issuance of a ticket. (See CPL § 140.10). Second, in People v. Boback, 23 N.Y.2d 189, 295 N.Y.S.2d 912 (1968), the Court of Appeals held that a traffic ticket may be based upon “information and belief”. That means that an officer need not have personal knowledge of the traffic infraction – he or she need not actually witness the traffic infraction.