Why did a former Coinbase manager spend 2 years in prison?

Could you please elaborate on the circumstances surrounding the imprisonment of a former Coinbase manager? I'm curious to know what led to his two-year sentence. Was it due to some form of fraud or embezzlement? Or perhaps it was related to a violation of securities laws? Could you provide some insight into the nature of his offense and the legal basis for his conviction? Additionally, I'm interested in understanding the impact this incident might have had on the reputation of Coinbase and the cryptocurrency industry at large. Thank you for your assistance in clarifying this matter.