The district attorney's office said that at around 3 a.m. on Oct. 20, Edward Sawicki III backed his car into a man walking on a south Philadelphia street, hitting his knee.
The victim banged his hand on the trunk of Sawicki's car when he was struck.
Prosecutors said Sawicki got out of his car, pulled up his shirt to show his city-issued handgun and rushed at the victim, yelling racial epithets and threatening to kill him.
The victim contacted police and Sawicki was identified as a Philadelphia police officer.
Police Commissioner Charles Ramsey said Wednesday that the 34-year-old officer is suspended with the intent to dismiss.