Sin_Researcher alt?

Hank being corrupt in these circumstances is a pretty dubious claim at best, and trivial compared to the numerous times Walt had already put him into life-threatening situations. Hank investigating and bringing Walt down is not screwing him over: he wanted firm evidence of Walt's activities and not just accusations. Considering he was promoted to ASAC for investigating Fring in the same manner (he explicitly says what he was doing was "extralegal"), I have a pretty hard time buying that this constitutes corruption, let alone a betrayal of Walt considering the entire event occurs because of Walt already having betrayed him.