The unnamed son went round to see Avtar Kolar, 62, and his wife Carole, 58, after they failed to answer his morning phone call. ‘It was obvious from the scene the couple had been assaulted and had more than likely died of their injuries,’ said Dep Supt Richard Baker, who is leading the inquiry. When asked if it might be a revenge attack linked to their son’s police work, Mr Baker replied: ‘We are definitely looking at that as a possibility but we have no information to suggest it is the case at this stage.’ Mr Baker added: ‘At 7.15 on Tuesday night, a family member spoke to Carole and there were no issues. At 8am yesterday, their son went round to find the couple dead at the scene.’ Detectives were keeping an open mind about what kind of weapon was used. ‘We have a full team of experts and forensic scientists now at the address,’ said Mr Baker. The couple, who had four sons and eight grandchildren and had been married for 40 years, had lived in Birmingham for most of their lives. ‘The local community – and the family – have been extremely supportive in what they are telling us and how they are co-operating with us,’ Mr Baker added. ‘We will catch the people responsible but we would like to make an appeal for information at this very early stage.’ More than 60 detectives, as well as uniformed offiers, from the West Midlands force are working on the case. Post-mortem examinations will be carried out on Thursday or Friday.