User blog comment:Zathronas/Speculative author: Who is Summer Rose?/@comment-24198837-20140809070112/@comment-96.254.157.84-20140809072333

It was never said what age Ruby was when she died. I'm using five years as a place holder because that's when a lot of significant changes began, particularly with the White Fang.

That actually bring up another theory. Maybe Summer s,ypathized with the White Fang and even talked to the previous leader about making changes. But Schnee didn't agree and somehow ended up killing Summer and betraying the White Fang's trust. That would be the start of the White Fang's violent reign and the starting point of Cinder's hatred.

Just a theory, mind you.