The body of 22-year-old pedicab driver Eric Sison lies in a coffin in a Manila slum with a chick pacing across his casket, placed there in keeping with a local tradition to symbolically peck at the conscience of his killers.

Cellphone video footage circulating on social media purports to capture the moment Sison was killed last month when, according to local officials, police were looking for drug pushers in the Pasay township of the Philippine capital.

A voice on the video, recorded by a neighbor, according to newspaper reports, can be heard shouting "Don't do it, I'll surrender!" Then there is the sound of gunfire.