ST. ANN, Mo. (AP) - A suburban St. Louis police officer shown on cellphone video pointing his rifle at demonstrators in Ferguson and threatening them is now out of a job.

St. Ann Police Chief Aaron Jimenez confirmed in an interview with The Associated Press that the police officer resigned Thursday. A phone call seeking comment from the officer was not returned.

The incident happened Aug. 19 during protests that followed the Ferguson police shooting death of Michael Brown.

On the video, a man is heard saying, "Oh my God! Gun raised!" as the officer approaches. The officer walks near the man, gun pointed, and appears to threaten to kill him.

A St. Louis County police sergeant forced the officer to lower the weapon and escorted him away. The officer was suspended a day later.

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