The investigation of a deadly shooting in Allentown has come into focus.

Lehigh County District Attorney Jim Martin said the Jan. 15 shooting death of Carlos Lugo on East Westminster Street remains under investigation, but at this point, he said it appears to be a case of self-defense.

"The reports are that there were three people involved in attacking the man who defended himself and shot one of the attackers," said Martin said.

The man who shot Lugo, 35, had a concealed weapons permit and was carrying a revolver when he was attacked, Martin said.

The day after the shooting, a chalk outline and bloodstains littered the east side neighborhood where the shooting happened.

"Preliminarily, we know there were two different types of caliber shell casings ejected into the driveway, so we know that there were two other guns involved, and we believe there was a third," said Martin.

Martin said the other people involved fled the scene after the shooting. Their identities are under investigation.

From the start, neighbors said they believed the shooting was a case of self-defense. One man, who didn't want to be identified, said he heard the shots and went outside to investigate.    

He said he was told by the man who was attacked to call police because he had just shot someone who tried to rob him.

Anyone with information about the case is asked to call the Lehigh County district attorney's office or the Allentown Police Department.