It's worth pointing out that Black sued the Government of the day over blocking his peerage (Black v. Chretien) and lost. So while he may say that it was a pers

It's worth pointing out that Black sued the Government of the day over blocking his peerage (Black v. Chretien) and lost. So while he may say that it was a personal vendetta that caused him to renounce his citizenship, it's not like he didn't have a recourse to due process. As for his conviction, it was both for honest-services fraud (which SCOTUS is in the process of unravelling), as well as for obstruction of justice - brought on by, among other things, being caught on a security tape removing (with the assistance of his chauffeur) a number of boxes of documents from his former office without court permission and in the middle of an investigation.