Some journalists have claimed that 'thousands' of documents which have gone missing at the National Archives are proof of 'history theft'. It's probably just old-fashioned incompetence.
A myth is doing serious injustice to the way historians have approached decolonisation.
As with most aspects of criminal justice in sub-Saharan Africa, the death penalty as it currently exists in law is a colonial import. Criminal justice before the modern era was a private matter.