CPD officer James M. Green, who also responded to the 911 call, testified that he noticed that Pring-Wilson had a dime-sized welt on his forehead.

Pring-Wilson said on the scene that he had witnessed a fight and he had intervened to help, Green said.

Green said Pring-Wilson appeared confused when asked which direction the victim and assailants had gone.

Green said Pring-Wilson refused medical help.

“He didn’t want to be bothered,” said Green.

Green also said Pring-Wilson told him he drank one or two beers that night, but the alcohol didn’t seem to affect his behavior noticeably.

“He appeared sober,” Green said. “He wasn’t slurring words or anything. He didn’t seem impaired by alcohol or physical injury.”

Cambridge Fire Department Captain Steven Boyle, a certified emergency medical technician for 30 years, noticed that Pring-Wilson had a lump on his forehead.

Boyle said he observed that Pring-Wilson had no problem standing or walking and denied losing consciousness, though in the motion to suppress Denner argued that Pring-Wilson did lose consciousness during the incident.

Boyle said from his experience it did not appear to him that Pring-Wilson suffered a serious head injury.

“What was obvious to me was the lump on his forehead,” Boyle said. “I would not refer to it as head trauma.”

However, Denner pointed out that in a report Boyle had written, he did in fact refer to Pring-Wilson’s injury as head trauma.

Boyle added that some of Pring-Wilson’s answers were garbled at the scene.

“I just couldn’t understand what he was saying,” Boyle said. “It sounded like he was trying to choose his words.”

Denner asked Boyle if he thought Pring-Wilson’s behavior in general was out of the ordinary.