Police yesterday released a picture of So Sheung-lan, parts of whose dismembered body were found across the territory last month. So, 35, was last seen in the Hong Kong-Macau ferry terminal in Central at 9.09 pm on July 21 on her return from a gambling trip in Macau. Pathologists have not been able to determine how she died and her head is still missing. 'We need the head to establish the cause of death,' Senior Superintendent Ian Mackness, of Crime New Territories South Regional Headquarters, said. Two people, So's former husband, 35, and his 24-year-old girlfriend, were arrested on July 26 and later released on $110,000 bail each. So's severed arms were found in a Tsuen Wan car park on July 22. Over the following two days her torso was found in a Tin Shui Wai rubbish dump and her legs were found in a Sheung Shui park.