Duchess 76
Air Traffic Control Fully Certified
Situational Awareness; Communication Breakdown; Confusion
ATC Issue All Types; Conflict NMAC
Flight Crew Took Evasive Action
Human Factors; Procedure
Training was in progress on LC1; Aircraft X was in the VFR pattern on right down wind and cleared touch and go following a Cessna on final; Aircraft Y was VFR on left downwind and sequenced to follow Aircraft X. Aircraft Y reported BE76 in sight and cleared to land following Aircraft X. The Controller then saw Aircraft Y and Aircraft X in close proximity to each other and issued a left three sixty to Aircraft Y. Aircraft X ask the Controller if he should go around and said 'that was a near miss.' The developmental Controller being trained was behind on his traffic and not keeping up; as the CIC I should have told his trainer he should think about taking over the position.
Tower Controller witnessed a pilot declared NMAC when traffic on a right and left downwind conflicted turning base to follow traffic on final; the reporter indicated the instructor should have taken Local sooner.