Board Thread:General Discussion/@comment-87.123.129.31-20160519165735/@comment-66.189.253.11-20160530221504

Well aside from Cinder forcibly stealing her powers... remember that Ozpin, Glynda, Ironwood, and Qrow said a maiden's power is transferred to the last person the previous maiden was thinking about before she died. They then went on to speculate that, when the world knew about the maidens, if they were killed, it would be a reasonable assumption that their killer would be their last thought. And the last thing Amber saw (presumably the last thing she thought as well) was Cinder.

However, there is some room for error. Because Amber was left comatose, and who know what goes on in the mind when that happens.