Randall tracked down Colin Phash over several systems, while Davidoff expressed impatience with his "trigger-happy" methods. Randall eventually tracked Phash to Gohbus Moon, scene of a terraforming disaster and much media attention. He was reluctant to give Randall clearance to travel there, and refused to hand over Randall's "secret weapon", a pack of "lobotomized" zerglings cut off from the Zerg Swarm which Randall could use to track psychics.
Instead, Randall was ordered to use "traditional" methods. However, the process didn't work, as the refugees refused to cooperate, so Davidoff gave permission to use the zerglings, provided they looked like a random incursion.