The man has been identified as 44-year-old Joseph Santos, of Hasbrouck Heights, New Jersey.
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The shooting happened at 5:45 p.m. Saturday along the 3700 block of Hamilton Boulevard.
Witnesses say minutes before the shooting, Santos darted into traffic, jumping on cars, damaging some of them.
South Whitehall police officers responded to the scene and began talking to Santos.
Viewer video captured crucial moments in the investigation.
Authorities investigate deadly police-involved shooting in Lehigh County
Santos can be seen in the video standing alongside a police cruiser. The video shows him walking away from the officer, and then walking back toward the officer.
An officer can be heard in the video, warning the man to get on the ground. Then, several shots are fired by the officer.
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It is still unclear if Santos had a weapon on him.
Police are trying to determine whether the shooting was justified. Pennsylvania State Police are leading the investigation at the request of the Lehigh County District Attorney.
The officer involved in the shooting has not been identified.
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