Retired UK detective has evidence his wife s cousin was Ivan Milat s first victim
Milat murdered seven backpackers in Belanglo State Forest, Sydney, in 1989-92
Family of Keren Rowland who vanished in 1971, are still searching for answers
Detective Sergeant Hugh Hughes believes Ms Rowland was killed by Milat
Milat died from oesophageal and stomach cancer in Sydney jail in 2019, aged 74