Killing other two sections of covenant infantry will trigger the civilians to demonstrate their associated with stolen UNSC weapons.
Then focus on the Jackals and Elites after they come within plasma pistol range. Built armed with accurate weapons, so pose a threat even only at that distance. http://Gardellafurniture.net/__media__/js/netsoltrademark.php?d=Richardleeds.net%2F__media__%2Fjs%2Fnetsoltrademark.php%3Fd%3DWWW.Camedu.org%252Fblog%252Findex.php%253Fentryid%253D106877