At 4:45pm Wednesday afternoon, a 911 call about a possible burglary at a twin home in the 6000 block of Christian Street.
Police said the uniformed officer was responding to a call of a burglary in progress at the Southwest Philadelphia address, and found the front door of the house open.
Lt. Ray Evers said he entered the home and was met by a man, and some kind of confrontation ensued.
"He sees the front door open. He enters the property think that it has been burglarized. There is some type of confrontation between the officer and the owner of the property. A shot was fired by the officer. The male was shot in the arm and went into his chest," explained Lt. Ray Evers.
He was taken to the Hospital of the University of Pennsylvania in critical condition.
Evers says no weapon was found on the man who was shot. The district attorney's office and the police internal affairs unit are investigating.
The unarmed man who was shot has been identified by friends as Sadeek or Stephen Moore.
Craig Sokolow is an attorney with the law firm where Moore worked.
"One of the neighbors said that the police were at his door. He saw them and came out shouting something like, 'It's my house'," said Sokolow.
Among the officials at the scene Wednesday night were Police Commissioner and a member of the District Attorney's office.
"The officer will be placed on administrative duty until a full investigation is conducted and the investigation is going to lead us where it leads us," said Lt. Evers. "It is what it is, but if something was done wrong, it will be addressed."
Moore, the father of two, was a frequent worshipper at a nearby Mosque. Members of the Mosque gathered at the scene saying they await the investigation's outcome.
"In my opinion, questions only cause the mind to race, and it's better to just be patient," said Imam Naadim Abbulkhabiyr._________________
The Associated Press contributed to this report.