Board Thread:General Discussion/@comment-87.102.2.235-20160720090052/@comment-73.196.143.202-20170123060318

The implication they seem to be going with is that Summer was on a mission with Qrow, and his bad luck ended up getting her killed. If I had to guess who did it, my first idea is Hazel, considering he was the one who said "We've dealt with their kind before." Tyrian would have recognized Ruby if he had killed Summer, and Cinder would have been too young, so the only other options are Watts or Salem herself.