A $1 million reward is on offer to help solve the cold case bashing murder of a Victorian grandmother during a “burglary gone wrong”. Kathleen Severino, 70, was found dead in the bedroom of her Ballarat home on January 1, 1988. Police say she suffered fatal head injuries after being “savagely assaulted” sometime between 10.30 and 11.30pm on New Year’s Eve. A witness reported seeing a man and woman near Severino’s home at the time. The residence was ransacked but nothing was stolen. Detective Inspector Andrew Stamper said on January 13 he was the confident the murder was a “burglary gone wrong”. “In all probability she heard the burglary occurring and was … subjected to a horrendous bashing,” he told reporters. “She disturbed someone in the house and as a result they’ve murdered her.” A 19-year-old man was arrested in 1990 but a murder charge against him was dropped after …