The general gist of the reports is that he was driving drunk, speeding, fled the scene of an evidently fatal accident, acted defiantly when confronted by the police, and displayed no remorse. The TV news has been particularly focusing on the man’s bad attitude after his arrest.
If all of those facts are correct, he deserves to receive a custodial sentence. Whether or not he spends time inside (he certainly would in the UK, but may be able to avoid it here), he’ll have to pay the victim’s family a very large amount of compensation, perhaps around NT$10 million, which apparently he can well afford.