Alright everyone, I believe I have discovered what happened while I was unconscious.

Nanami and I were saved from the brink of death after Zack tried to murder us both-- and the only person who could have done that was Tamamo herself. With her own ~incredible~ Noble Phantasm.

Not because Tamamo cared about our lives, of course. But because she needed to be the one who killed in order to reap the benefit of the motive. As you can see I have verified the murder weapon. The piece I found came from that sneaky fox's mirror. Naturally she tried to dispose of it in a location far from the crime scene-- however, she did not realize that before I passed out, I was able to grab one of the shards and protect it. After all-- it was my lifeline... the only thing I had to defend my innocence.

She could only use the power once-- so it didn't matter if the mirror got smashed afterwards. It already served it's purpose.