"It would."
"If I go after the film angle, I can find the costume rental and the advertisement for actors for his short film." She made little quote marks in the air for the word film.
"If he's just a stalker and he made the costumes, then you have fewer leads to follow."
"Don't say he. You don't know that the killer is a he."
"You're right, I don't. Are you assuming that the killer isn't human?"
"Should we be?" she asked, her voice neutral.
"I don't know. I can't imagine a human strong enough or fast enough to grab six demi-fey and slit their throats before the others could escape or attack him."
"Are they as delicate as they look?" she asked.
I almost smiled, and then didn't feel like finishing it. "No, Detective, they aren't. They're much stronger than they look, and incredibly fast."
"So we aren't looking for a human?"
"I didn't say that. I said that physically humans couldn't do this, but there is some magic that might help them do it."
"What kind of magic?"
"I don't have a spell in mind. I'm not human. I don't need spells to use against other fey, but I know there are stories of magic that can make us weak, catchable, and hurtable."
"Yeah, aren't these kind of fey supposed to be immortal?"
I stared down at the tiny lifeless bodies. Once the answer would have simply been yes, but I'd learned from some of the lesser fey at the Unseelie Court that some of them had died falling down stairs, and other mundane causes. Their immortality wasn't what it used to be, but we had not publicized that to the humans. One of the things that kept us safe was that the humans thought they couldn't hurt us easily. Had some human learned the truth and exploited it? Was the mortality among the lesser fey getting worse? Or had they been immortal and magic had stolen it away?