Board Thread:Manga/@comment-5774380-20160609000528/@comment-25322628-20160615040754

AhmedHadi1 wrote: It's possible, like I said, Levi did not cut Reiner's neck out clean he just stabbed through it. And when they blew Reiner's brains out, his nape was still intact could be why he regenerated a new head and as for his memories, he saved them by transfering blah blah to his Titan form's brain because he was still linked to it. No, they said he transferred his brain functions to the rest of his body in Titan form. As for how he regenerated, his nape was still intact.

A shifter killed in human form seems outright possible to achieve. A shifter can only change while conscious and have a specific goal in mind, so kill the shifter in their sleep; no goals for an unconscious mind and they're vulnerable as ordinary people are in their sleep.