![Mazim, Mr Ahmed's son.](/web/20161230113346im_/http://www.smh.com.au/content/dam/images/g/t/j/o/y/y/image.related.wideLandscape.620x349.gtjrk4.png/1483096667810.jpg)
'I need you to look after my family': Sudanese refugee's final message
Faysal Ishak Ahmed carried a deep secret and a burning fear during his years in detention on Manus Island, long before he became the fourth asylum seeker to die after seeking protection in Australia and being sent to Papua New Guinea.