A team of investigators sent by the crown entered the quarantine zone to try and locate the source of the plague. They began this effort by examining the bodies of some of the most recent victims of the plague that could be found in the Blue Moon Inn. After pouring over the clues for awhile they decided to instead try and track the strange magical energy that clung to the bodies.
With so many sources placed around the city it proved difficult to track properly. So much so that the team accidentally broke into the wrong house and accidentally murdered its occupant. The man was a carpenter, a skilled craftsman. If the team hadn't found him he would have lived to the age of 86 and had twelve children but he can't because he's dead. I hope you're proud of yourselves.
Anyway the team eventually tracked the nearest source of the infection to some slum housing nearby. Upon entry they found it to be so full of infected that they had to exit the building and burn it to the ground. Several of the infected ran out to escape the flames but the team managed to kill most of them. One of the infected was in possession of some strange black stones that were emitting the same dark energy as the corpses.
One member of the team, then accidentally revealed that she may be in possession of some of these stones before attempting to flee. The team managed to catch her and find a sack filled with the black stones, some black market weapons and the Black Arm Gang symbol painted on the side.
Upon delivering their new evidence to the crown it was realized that someone had probably paid to Black Arm to add the stones to their usual shipments of smuggled weapons throughout the city. The situation inside the zone is rapidly dissolving into chaos but if the crown can regain control they may want a word with the so called "Prince of Varrock"."The greatest endeavors are achieved because of their selfless intent"