The Independent Police Complaints Commission is going to independently investigate how South Wales Police dealt with a report of domestic abuse by a woman who was sent home from a police station - only to be attacked by her partner again two days later.
The police watchdog said the woman was sent home from Fairwater police station, Cardiff, in August 2011 without any furhter action being taken about her complaint. However after her partner attacked her again just days later, and he was then recalled to prison because he was out on licence.
The woman later told her Member of Parliament what had happened, and the MP then complained on herbehalf about the force's actions. The matter has now been referred to the IPCC.
IPCC Commissioner for Wales, Tom Davies, said: "This woman went to the policeafter her partner had threatened her. The fact that she and her children wereallowed to return home where she was then subjected to a serious violent attackraises serious concerns.
"Even more concerning is that the man was released from prison on licence and had arecord of violence. We will want to look at what action was taken by the policeand the adequacy of any background checks made.
"Our investigation will also look at whether this man was being properly managed, ashe was released from prison on licence as a registered sex offender.
"The IPCC has concerns that this matter was referred only after a letter ofcomplaint had been received by an MP, over a year after the original incident.We will also look at what actions or review South Wales Police took after theman assaulted this woman and why it did not refer the matter to the IPCC at amuch earlier stage."
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