Heroes 4-9 “Brother’s Keeper”

It seems the Haitian didn’t tell Peter the entire truth, because Peter seems to think the Haitian just came to wipe their memories. I’m not clear on why he thinks that or what memories need wiping. It’s also not clear whether the Haitian knows that Peter is Sylar. It seems that he does, but then it doesn’t even make sense that Angela would send him for a memory wipe, since he’d negate Sylar’s powers and ruin the illusion. I’m very confused. Anyway, he gives Peter a slip of paper and warns him that the truth may be more terrible than he can bear.