I think it was just a case of
Michael meeting (human)
Randy at the waterworks and he saved Michael's ass and got turned in the process.
My theory on how it goes down is like this (and KC will probably blow this all to hell when we get the real story but that's part of what makes theories fun):
CJ sends Randy and the other "techies" to the waterworks to ...well, work on the water. They get attacked by the behemoth and Randy is the only survivor and finds himself a hidey-hole to hole up in.
A few weeks later Michael and company show up at the waterworks looking to fix the water supply, Michael gets separated from the group by the behemoth stalking the place.
Randy finds Michael and pulls him into his hidey-hole where the two start working on a plan to get out.
Randy possibly tries to use the machinery in the waterworks to cause a distraction but things don't go smooth and Randy gets bitten and Michael breaks his arm.
Michael now feels guilty that he got out while Randy died, this is compounded by the fact that Randy is now an active smart zombie.
At least that's how I see it going down. Like I said this will probably turn out to be completely wrong when we get the real story but this is what I'm staking my claim on.
Bookmarks