MARDAN, July 17: Police have resolved the mystery of blind murder of former DSP’s wife and daughter after arresting his grandson in the Garikapora area. The investigative officer, Sub-Inspector Fazil Khan, while speaking at press conference on Tuesday, said the wife and daughter of former DSP Shad Ali Khan identified as Iqbal Sultana and Ishrat Sultana were killed by unidentified killer five days back. He said they arrested the DSP’s grandson Tanveer after starting investigation of the double murder on scientific lines. —Correspondent