Sept. 8 (UPI) -- Dorian Johnson, the key witness in the death of a Black teenager by a White Ferguson, Mo., police officer more than a decade ago that sparked nationwide protests, was killed in a shooting over the weekend, according to authorities.

Johnson, who witnessed the 2014 police shooting that sparked the "hands up, don't shoot" outcry, died Sunday morning in Ferguson in what "appears to be a domestic incident involving a claim of self-defense." One person was arrested, but released after being held without charges for 24 hours. No officers were involved in the shooting.

"The investigation remains active," St. Louis County Prosecuting Attorney Melissa Price Smith said in a statement. "The Ferguson Police Department is engaged in ongoing consultation with the St. Louis County Prosecuting Attorney's Office regarding possible criminal charges. We will announce any charging decisions made regarding this matter of evident public interest."

In August 2014, Johnson revealed he had witnessed the death of his friend, 18-year-old Michael Brown, after he was shot multiple times with his hands in the air by a police officer in Ferguson.

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