Earlier quoted context omitted.
In the UK, which is a common law country, the local coroner would be involved with any death that was not expected (i.e. not an older person or someone who is terminally ill and under medical care) or in which there are suspicious circumstances. That process may involve a police investigation and, independently of that, there can be an inquest. Inquests have quite a history in the case of deaths in police custody in…
Yes, a whitewash would never happen in the UK. https://en.wikipedia.org/wiki/Hutton_Inquiry
http://www.dailymail.co.uk/news/article-488667/Why-I-know-we...