Murderer, as a result of the fight that went on for about an hour, the AU was completely in ruins, with no one left alive other than Sans and Napstablook, looking around them both, they saw the carnage caused by them, as Sans did not know what or who caused all of this, he had...
Sans does not take action against Frisk. Instead, he deceives Torrill to let Sans enter the ruins before Neflisk comes to the Heritage House. Sans kills Torrill and locks papyrus in the house in advance. This plan is very successful. ...