Hong Kong police slammed for ‘kicking man in an alley and referring to him as a yellow object when questioned’ in online post by self-proclaimed family member

• Uproar centres on clips that critics say show police kicking detainee after he was subdued in back alley, but force denies this
• Police initially denied that a person was visible in the video, saying the man was a ‘yellow object’, but footage from other people suggests otherwise