So who should be blamed in the bank's side? I'm pretty sure that they are looking in their side who would take the blame so that the bank won't be heavily blamed and it will result in a human error. About the man who gambled the funds, I'm sure he's now getting dumped in the prison and who knows that man is already living in hell because the government is putting pressure on the warden (some instances these will happen).
the man did make a big mistake but he actually didn't commit a major crime, from the story that happened that it was a pure mistake from the bank. Psychologically those who are not very honest will immediately use the opportunities available to become rich overnight. he will definitely be in prison for a few years but if he wisely keeps the money, when he gets out of prison he will be able to safely enjoy the money.