Expert criminologist weighs in on conwoman Melissa Caddick's disappearance
Comes after stomach flesh with a belly button washed up at Mollymook Beach
They were discovered 150km north of Caddick's foot, found on February 21
Dr Xanthe Mallett said could mean 'something sinister' had occurred to Caddick
Caddick went missing on November 12, 2020 after an ASIC raid on her house