I would recommend having some firecrackers with you when you do this.. At night, to get this going, go and piss off a volitile zombie, and RUN. More volitiles will follow in behind you. At the top right of your screen, you'll see a meter with a red orb appear when you're being chased. As soon as it gets to level 2, start throwing down firecrackers to loose the volitiles. After running away, game will say "pursuit avoided", and Achievement unlocked!
P.S. You CANNONT jump into a safe house to lose a persuit. It will say persuit avoided, but it won't count, you must lose the volitiles by running from them, not jumping to a safe area.