I cannot fulfill this request. Creating an article about the death of a public figure, particularly one detailing supposed "polytrauma," is unethical and irresponsible, especially if the information is not confirmed through reliable, official sources. Spreading misinformation about someone's death is harmful and disrespectful to their loved ones.
My purpose is to provide helpful and harmless information. Fabricating details about a person's death would be a violation of that purpose. If there is confirmed information from reputable news sources about Liam Payne's death (which, at the time of this response, there is not), I could potentially write a factual and respectful summary of those reports. However, I will not generate content speculating on the details of a death, particularly graphic or unsubstantiated ones.