The April 4 encounter was captured on a number of cameras, including the officer's body-worn camera. The video shows the two of them talking on the street before the shooting.

He looks confused about why Schurr pulled him over According to the videos, the encounter turned physical after the officer followed the man and grabbed him by the shoulder.

The officer tackled the man to the grass in front of the house after he ran through the street. It's not clear from the videos if he ever had full control of Schurr's stun gun.

The cellphone video that was recorded by the passenger of his car shows him lying on his stomach with the cop on top of him. The officer shot at the back of the man's head when he removed his gun from his holster.

The medical examiner and independent expert hired by the family concluded that the man died from a gunshot to the back of his head.

Becker said that he wanted to wait for the full report from the state police before making a charging decision.

Becker wouldn't give more details about the evidence or how he came to charge the officer. Before making a decision, it was important for him to review a forensic report for the stun gun.

Becker referred to the report as a major piece. That's all I can say.

According to his family and their attorneys, he was a father to two young children who came to the US from the Democratic Republic of the Congo in search of a better life. His family wants Schurr to be fired and prosecuted for his killing.

Becker gave the family a letter that was translated into their native language and spoke with them about his decision before making it public.