Ok, let's start at the beginning. Back on June 20th police were called out to the local pond where they found two men fighting with kayak paddles out on the water.
The Daily Hampshire Gazette has the full story:
In an application for a criminal complaint, police said Richard Rovelli was in a kayak and began yelling at a man in another kayak who said Rovelli had crashed into him. Rovelli began swinging his oar at the other kayaker, striking him in the head three times and the chest once.
In his statement to police, the alleged victim said he used his oar to try and push Rovelli's kayak away and Rovelli fell into the water when he did so.
Rovelli swam to the man's boat, pulled him into the water and completely submerged his head. “During this attack, I feared for my life. I believed this male was trying to kill me,” the alleged victim said in his statement.
The man said the attack stopped after he was able to pull his kayak between himself and Rovelli.
More info: gazettenet.com