The wife of an army Colonel, who has accused 12 Punjab police personnel of assaulting him and his son over a parking dispute, has started a sit-in protest along with ex-servicemen outside the Patiala Deputy Commissioner's office to press for a CBI probe. The family is demanding a CBI probe and the transfer of Patiala Senior Superintendent of Police Nanak Singh, accusing him of failing to take action on their multiple requests to file an FIR. Despite Patiala Deputy Commissioner (DC) Preeti Yadav assuring them of a fair and transparent probe, the family refused to lift the 'dharna' and said it would continue until their demands were met.