A motorist was caught drink-driving after reporting an alleged incident involving his son to police, a court heard.
Vaughan Poole, 48, complained about the matter at Ripley police station and officers suspected he was drunk.
He said he had drunk two cans of cider and a can of lager before driving to a shop to buy more alcohol.
He said he then had an altercation with his son in the shop, Laura Dyke, prosecuting, told Chesterfield magistrates.
Poole, of Lower Chapel Street, Ilkeston, gave a reading of 90mg of alcohol in 100mls of breath - more than two-and-a-half times the limit.
He admitted drink-driving in Wyatts Way, Ripley, on July 6. He had no previous convictions.
He was fined £235, with £85 costs, and banned from driving for 18 months, to be cut to 14 months if he passes a drink-driving course.
“He had been drinking at home and he had perhaps not realised how much he had taken on board,” said Tim Haines, for Poole.
He added: “There was animosity following the breakdown of his marriage to his son’s mother. His car was vandalised by his son and he drove to the police station.”