RAWALPINDI - Police arrested a man involved in the murder of a couple in Wah Cantt on Friday. According to the Wah police, the couple, Shafiq and his wife Mumtaz Bibi, had lent money to Sajid some months ago. Sajid shot them dead when they continually asked him to return the money. The killer told the media that he had returned the money but the couple was asking to pay interest.