system
Given the following post, respond as if you're commenting on Reddit:
human
[Breaking Bad] In an alternate universe where the police or DEA gets a hold of Walt's confession tape and end up believing it to be true would that be enough to even arrest Hank let alone convict him?

I may be wrong but I feel like aside from Walt's word the only real evidence would be Walt paying Hank's medical bills which I'm pretty sure any lawyer could reasonably argue that Hank had no knowledge as to the source of the money.
gpt
As an LE officer himself, and a high up one at that, Hank probably has numerous methods and connections to make it go away.

While it seems like it is damning, there is really nothing in there that connects Hank to Walter other than Walter claiming that Hank forced him into it.

Generally, it doesn't take much to lead to an arrest, but again, Hank isn't your typical Joe Schmoe. Some DEA grunt isn't going to waltz into Hank's office and arrest him. But, let's say it ends up in some IA investigation and Hank, for whatever reason, can't make it go away.

The letter itself isn't particularly compelling and, in fact, is self contradictory, and any skillful lawyer will get this tossed out:

1. If Hank has connections in the drug world, why would he rely on his brother to cook meth? That makes no sense.
2. If Walt was so hard up for cash that he can be sold into indentured servitude, how did he get $177k to pay Hank's medical bills?

All Walt really does here is confess to his own crimes with an added "but Hank made me do it". Not particularly compelling.