One such area is when medics, normally doctors but it can be any, are accused of failing in their duty to such a degree as to go beyond the sort of negligence that results in them being sued, or even that level of lack of care that means that they are subject to disciplinary proceedings, and into the realms of conduct so bad that it properly results in criminal proceedings.
On 31st July 2017 there was a good example of this as the Court of Appeal quashed the conviction of Honey Rose for gross negligence manslaughter.