annie mccormick explains why coming up. >>> also an accident in delaware county takes the life of an elderly man and leads to the arrest of a person warranted by police. >>> and hermine is off the coast and causing some concern along the jersey shore. >> now the details, philadelphia police expect to release the name of an officer involved in a shooting. action news has learned that the 19-year-old shooting victim is the shooter's son. annie mccormick has the full details. >> reporter: neighbors on this quiet block say they are surprised. this morning the police commissioner said this is very early in the investigation. 911 calls reporting a shooting started coming in around 6:30 monday evening. police descended upon this home. inside an off-duty philadelphia police officer got into an argument with a 19-year-old man. later identified as the officer's son. >> apparently they got into some type of argument or something. the off-duty accidentally or inadvertently discharged his weapon. we're still trying to figure that out whether it was intentional or not. >> shocked. the guy was usua