Many people are debating the last page of the recent chapter, where kakashi appears to have stabbed rin. I have'nt really made up my mindabout this, but some points to consider:
- kakashi was not a member of root, the arm of anbu famous for missions like killing ones own tesmmates/friends.
- Kakashi had minatos kunai. The 4th said it had a special seal which alerted him when it would fly, which is why he came after obitos death to save k and rin.
- If it was an accident or if kakashi had fought hidden mist shinobi or zetsu, its unlikely that he wouldnt use that kunai even once. Unless kakashi hasnt even arrived at the scene yet....
- Theres too much suspicion about madara knowing obito would return. Kakashi also said when he died against pain that he couldnt save rin, which ties in with this more than him killing rin.
Just my 2 cents.