so, it was said that Bixie will go crazy 'again' if Tianlu tell. him about the death of Sibu. That mean the reason he gone crazy back then is also because knowing that Sibu was dead. That, again, mean that he didnt know about the death, so it might not be him who killed Sibu. Could it be someone else, and Bixie got the blame?
(and thanks for the chapter)