Board Thread:Speculation House/@comment-71.84.15.225-20150807131522/@comment-26397825-20150903013317

Cinder is confirmed to only be a coupe of years older than the guys, so mid twenties at the latest. Unless she was murdering people before she turned 15 (depending on exactly how old Yang was, which may have been anywhere between 5 and 9, really) she didn't kill Summer Fall.