He is 54-year-old Kevin Garner of the 1500 block of North 8th Street.
The suspect is described by police as a well-dressed light skinned man with a gun.
Police say just after midnight, 26th District officers received a police radio call indicating that shots had been fired at Ninth and Diamond streets.
When officers arrived they found Garner lying in the street in front of an ATM with three gunshot wounds.
Garner was taken to Temple University Hospital, where he was pronounced dead.
Investigators say the victim was withdrawing money from the ATM on the street corner outside the Diamond Deli, when the gunman confronted him.
Lt. Ray Evers said Garner was "simply using an ATM, like we all do, and he was savagely shot in his back and his neck."
After shooting the victim, the robber grabbed $200 in cash and jumped into a car.
At least one man in the neighborhood, hearing of the fatal robbery, questioned using an outside ATM.
"You set yourself up. You don't use an outside ATM around here," said Kevin Brockenbrough. "If it's not inside you don't do it."
Garner and his wife lived about 6 blocks away he worked as a gardener.
Kevin was a sweetheart. He was a loving, he was kind," said his sister-in-law, Jacquline Garner. "He was a veteran in the army, he was a sweetheart."
Neighbor Rashan Brooks said Garner was "nice to everybody he met. We had drinks together, we laughed, we talked, we had barbecues, we ate together. He never did anything to anybody."
Anyone with information can contact Philadelphia Police at 215.686.TIPS (8477) or submit a tip through the police website.