User blog comment:Fliu/Chapter 956 Thoughts/@comment-910220-20190920042030

I think the news report is that Sabo killed Kuma; although Sabo did it out of mercy for the now will-dead PX-0, the news made it sound as evil as possible. Of course the Revolutionary Army would be shocked that one of their former commanders was killed by their second-in-command. Makino and the Dadan Family were all devastated that the Sabo they knew would be do something that the news made out to be malevolent.

Either that or he murdered Rosward to avenge Kuma's suffering.