Dyfed-Powys Police is reviewing how it handled allegations of sexual abuse against a judge who it was claimed was a friend of its former chief constable.
The Independent Police Complaints Commission (IPCC) has told the force to look how the case was investigated.
The judge's ex-wife, who made the claims, took High Court action after the IPCC dismissed her initial appeal over the force's investigation.
Mr Grange retired suddenly last November over an unrelated matter.
In 2006, the judge's then wife - who like him cannot be named for legal reasons - made a number of allegations including claims he had sexually abused young girls and looked at child pornography.
In July 2007, the force dismissed her complaints that its officers had failed to properly investigate her allegations, including that there was an "appearance of bias" because the judge was allegedly friendly with the force's then chief constable, Mr Grange.
Judicial review
She appealed to the IPCC over the handling of the case but it initially ruled the complaint had been received outside the strict 28-day time limit which governs such matters.
She then went to the High Court in June and after she was granted a judicial review the IPCC said it would look at her complaint.
At that hearing the court was told the judge involved in the case had always protested his innocence, and said his ex-wife was trying to get back at him over their divorce.
Now the IPCC has said it has told Dyfed-Powys Police it should appoint a new investigating officer to re-investigate her complaint.
"As this matter is now being investigated by Dyfed-Powys Police, and could be subject of an appeal to the IPCC, it would be inappropriate for us to comment further at this stage," read a statement.
Mr Grange retired suddenly after his former lover made misconduct allegations against him two months after their affair finished.
Earlier this year the IPCC upheld claims he had misused e-mails and a credit card.
The CPS said there was insufficient evidence to prosecute him for misconduct in public office.
^ Back to top | BBC Sport Home | BBC Homepage | Contact us | Help | ©
~RS~q~RS~~RS~z~RS~15~RS~)