Wales' Independent Police Complaints Commissioner has published an overview of his supervision of the police investigation into the Lynette White miscarriage of justice investigation.
Tom Davies says lessons have been learnt from the "groundbreaking investigation" which will guide future investigations into serious misconduct.
I carefully considered the need for a full investigation which would carry with it the confidence of the public, as well as Lynette White's family and the Cardiff Five.
In the end I decided that South Wales Police had to actively engage with the public in Wales to try and restore its reputation and I decided the most effective way to do this would be for the force itself to carry out the investigation. I believe that the subsequent investigation I supervised has met that test.
An Independent Advisory Group, which comprised a number of leading academics and members of the local community, chaired by Professor Margaret Griffiths, played a key part. I want to play tribute to their invaluable role in acting as a critical friend and ensuring that key decisions were carefully scrutinised before being acted upon.
This was a groundbreaking investigation and many lessons have been learnt from this to guide future historical crime and serious misconduct investigations and improve police practice in future.
More top news
A plan to secure the future of Port Talbot steelworks will be unveiled to staff on Wednesday, ITV News understands.
Three men allegedly murdered a father-to-be in the street in broad daylight over drug debts, Cardiff Crown Court has heard.
Michael Wheeler, 22, admitted causing Sophie Taylor's death by dangerous driving during an alleged car chase.