The call came in just before 3:00 AM on Monday, when someone told officers that they had seen three men enter the area of 50 Rowe's Wharf, get into a secured dock there, and climb aboard one of the boats.
When they got there, police said they saw two people, later identified as Zachary Whiting, 19, Lawrence Kirlis, 18, both of Bridgewater, standing on the bow of the 97-foot luxury yacht "Valiant." The boat is owned and operated by the Charles Riverboat Company. A spokesman for the company said nothing was damaged or stolen on the boat, and thanked the police and the Rowe's Wharf security team.
After ordering the teenagers to get off the boat, officers said they heard splashing on the other side of the yacht. They found the third suspect, Ryan Convery, 19 and also of Bridgewater, was flailing in the water and choking, and said he couldn't swim. Police on scene told Convery to grab on to a rope and managed to hoist him out of the water.
Convery was taken to a hospital, and later booked normally. Police also discovered what they described as a "large bottle of vodka" in Whiting's hoodie.
The three men were scheduled to be arraigned in Boston Municipal Court on Monday. Whiting will also be charged with possession of alcohol by a minor.