Police tracked Pring-Wilson to his Somerville apartment where, according to LaGrassa, he was arrested. The Boston Globe reported yesterday that Pring-Wilson was arrested at the police station after he went there at officers’ requests.

Jeffrey Denner, Pring-Wilson’s attorney, said his client had been assaulted and acted in “reasonable self defense.”

By Denner’s account, Pring-Wilson had gone to a Western Avenue nightclub earlier that evening and encountered Colono when he was walking home.

Denner said Pring-Wilson was attacked by Colono and another man, and pulled a pocket knife to ward off the attackers.

“Many people carry pocket knives. He’s from Colorado,” Denner said.

Police searched Pring-Wilson’s apartment Saturday afternoon, but it remains unclear whether they have recovered a weapon.

Denner said Pring-Wilson is “incredible regretful someone lost their life” and “feels badly for the family and friends” of the victim.

Neither LaGrassa nor District Attorney Martha Coakley returned phone calls yesterday, but officials said Saturday they had not determined a motive in the stabbing.

Neither Pring-Wilson nor Colono had criminal records and it was unclear whether the two knew each other or what they were arguing about, according to the District Attorney’s office.

“We don’t believe there was a prior relationship, but it’s obviously still early in the investigation,” LaGrassa said.

But both parties had been drinking.

A source close to officials on the scene of the stabbing said that Pring-Wilson was intoxicated at the time of the incident. Denner said only that his client “had some drinks” that night.

The victim’s brother, Mario Colono, said he believed that his brother also “had a few drinks” Friday night.

Officials on the scene said the fight may have left Pring-Wilson with a head injury, although the District Attorney’s office reported that Pring-Wilson had not been injured.

The Defendant