No one in the group of men outside the Kings Convenience Store on Frankford Avenue Thursday night seemed to notice the man in the medical mask who strode by them.
© STEVEN M. FALK/The Philadelphia Inquirer/TNS
Deputy Police Commissioner Christine Coulter talks to the media where 6 people were shot one fatality on the 4900 block of Frankford Avenue, Thursday.
Until he turned and opened fire with a 9mm handgun.

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Surveillance video recovered by police shows how a casual moment outside a convenience store that turned deadly as the still-unidentified gunman killed one man and wounded five others — and sparked a running gun battle that littered the street with nearly 50 bullet casings.
One of the men targeted by the gunman fired back, chasing him down a nearby side street.
Meanwhile, neighbors huddled with their children on their living room floors to avoid stray shots.
The shooting