"You didn't really kill Marcus."

Uhhh...yeah he did. He fucking well did.

I don't know how much of Marcus' torso was left attached to his groin, (looked like just his spine) but given how his intestines
spilled out with relatively little movement, I highly doubt he could have survived even if he was teleported to an operating room.

In Squid guy's brain Jigsaw would get off scott free because "he didn't really kill anyone"

So he's a squid, not an octopus. My bad! Still, cephalopod anthro for the win!