A Marina man is under arrest in connection with a December armed robbery. Police say 18-year old Shaunne Katoa is suspected of robbing a juvenile at the Preston Park baseball field on December 5th. Police served search warrants related to the investigation and arrested Katoa, who was booked into Monterey County Jail on suspicion of armed robbery and possession of stolen property. Investigators are looking for witnesses and other information related to the incident.