The NYPD released video of the incident on July 11th, when the 25-year-old victim was riding a bicycle in the vicinity of Johnson Avenue and Humboldt Street in Williamsburg.
Police say he was approached and instructed to pull over by four unidentified males riding in a vehicle.
The men displayed silver shields and identified themselves as immigration officers.
Three of the four exited a gray minivan, pushed the victim to the ground and took his wallet.
The three reentered their gray minivan and drove away. The victim refused medical treatment at the scene.