CLUNK! CLUNK! the ladder went as the Doctor climbed to the roof, he had his M1 slung over his back and a M9 in his pocket. he reached the roof with a speed and vigour and took a position over looking one of the hospitals main entrances. he could see infected migerling around what looked to be a human carcase. he smiled and took aim, adjusting his sights to a better zoom. 

he waited their for a few minutes until a movement caught his eye, somebody (and he wasn't sure who) had ran from a alleyway towards a car that was parked at a corner store. he readjusted his sights on to the mystery person and watched what would happen