Do YOU know exactly what happened?
Having read the report it seems that it was dark in the early hours of the morning, the rider was driving too fast on his Honda CB650R, lost control on a corner and hit a street sign. He subsequently died.
Now unless your name is Wirat Wiratchalap, you were not there either. An eyewitness, Wirat Wiratchalap, shared his account of the incident, stating that he saw the man driving at high speed before losing control of his motorcycle on a curve.
When you are dead it, doesn't matter what people say about you.