High Quality Content by WIKIPEDIA articles! Every society has its own sets of moral standards and expectations. Different legal systems and laws develop and evolve based on these moral standards and expectations. Following the common law system introduced into Hong Kong when it became a Crown colony, Hong Kong`s criminal procedural law and the underlying principles are very similar to the one in the UK. As if in other common law jurisdictions, Hong Kong follows the principle of presumption of innocence. This principle penetrates the whole system of Hong Kong`s criminal procedure and criminal law. Lord John Sankey once described this principle as a `golden thread`. Therefore, knowing this principle is vital for understanding the criminal procedures practised in Hong Kong.