I killed three of them.. With three shots. The fourth guy escaped though, which helped me realize that person on the roof wasn't even there. So I used this as my advantage and went to catch up with Megan. I got to steal a car, I tried to stop Fortuity from escaping Megan but he leaped onto the windshield and then off to the back of the car, when this happened Fortuity came after me. But was interrupted with a bullet to the chest.