Williamsburg.

The morning after the evening in Williamsburg with Erik, a new corpse was found. Always a Shadowhunter and always the same modus operandi: runes cut off the skin of the unfortunate young man and thrown on the street, around the dumped corpse, always left somewhere it would be found by someone from the Invisible World.

The corpse, is that of the Shadowhunter who was at the restaurant with Raj and was, of course, found in Williamsburg, reknown Warlock territory.
It is the 6th corpse on 3 days, three had werewolves' tracks, claws and bite marks, two were found totally drained of blood and with bite marks typical of vampires and now this one. The coroner found a single black hair on the corpse and from the DNA it is clear it belongs to a Warlock, but they cannot know to which Warlock in the specific, and the exact same goes for the vampire and werewolf DNA found on the other corpses.

Of course it is considered a big emergency and the top priority to find the responsibles and stop this mass murdering, hence why the Clave itself took the matter into focus.

Werewolves were targeted first, Luke's DNA was taken to compare to that found on the first corpse, which was found in the territory of his pack.

Octavian had to take every witnessing and possible clue, both from other Shadowhunters and the Downworlders who might have seen something and with the latest corpse, it led to a very unpleasant possibility.

Knowing their personal bonds with the Warlock, Octavian decides to discuss the matter privately with the young Shadowhunters, also believing that it will be in everybody's interest if they go to speak to him themselves rather than sending someone else.

Octavian summons Jace, Izzy, Alec and Noah to his office.