Philadelphia police investigate a shooting that left a 42-year-old man in critical condition in front of Mastery Charter School. WEST PHILADELPHIA - A man was hospitalized in critical condition after he was shot in front of Mastery Charter School Sunday morning.Officials say the shooting occurred on the 5200 block of Media Street, in front of Mastery Charter School Sunday, about 5:30 in the morning.Responding officers found a 42-year-old man with a gunshot wound to the chest.He was taken by officers to Penn Presbyterian Medical Center and listed in critical condition.Police said an investigation is underway.