Boulder police on Monday launched an internal investigation after video surfaced of multiple officers confronting a black man who was picking up trash at his own house.

According to a news release, a Boulder police officer observed a man sitting in a partially enclosed patio area behind a “private property” sign in the 2300 block of Arapahoe Avenue at 8:30 a.m. Friday and asked if the man was allowed to be there.

The man told the officer he lived and worked in the building, and gave the officer his school identification card, but the officer detained the man to investigate further.

The officer then made a request over the radio for additional assistance to respond, saying the man was uncooperative and unwilling to put down a blunt object. Several other officers, including a supervisor, responded.

Police found the object the man was holding is a device used to pick up trash, and officers left the area.

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