Ferguson Police Chief Tom Jackson has issued a video apology to the family of Michael Brown, saying the 18-year-old's body was left in the street for too long last month after he was shot dead by an officer in the St Louis suburb.
The video was released by a public relations agency on the day Mr Brown's parents were in Washington with civil rights leaders.
Mr Brown was killed on August 9 during a confrontation with Officer Darren Wilson, and his body remained in the street for more than four hours.
The incident sparked racial unrest and numerous protests, including some that turned violent. In the video, Mr Jackson also apologised to any peaceful protesters who felt their rights were violated.