Who is Long Xiaowu's murderer in the sixth group of major crimes unit?

Long Xingguo. Long Xingguo did not kill Long Xiaowu, but killed his good brother, because Long Xingguo sold the house to collect the ransom in order to save his good brother, but the good brother said nothing about the ransom and was only willing to give tens of thousands of dollars, so he was disheartened and hired a killer, but the killer mistook the person and killed Long Xiaowu by mistake. "Six Groups of Major Crimes" is a TV series of criminal investigation and police robbers. From the official release of 200 1 to 20 10, 4 episodes have been released, and the total number of episodes is 136 episodes.