Rodriguez said the he landed one punch over the defendant’s left ear after he went to his cousin’s aid, and added that Pring-Wilson fell to the ground when he pulled him off Colono.

But he said Pring-Wilson wasn’t unconscious at any time during the fight, as Denner claimed in his motion.

Rodriguez’s girlfriend, Giselle Abreu, testified that Pring-Wilson did not appear to be injured in any way.

Police dispatchers testified on Thursday that Pring-Wilson denied murdering Colono in a 911 call at 1:50 a.m. the night of the incident, and said Friday that Pring-Wilson also denied the stabbing when he spoke to police later that morning.

Police and medical personnel also testified on Friday that Pring-Wilson did not exhibit abnormal behavior in the days following the altercation.

—Evan M. Vittor contributed to the reporting of this story.

—Staff writer Hana R. Alberts can be reached at alberts@fas.harvard.edu.