The family of a man who died in Villawood Detention Centre last month say they do not believe he died of a heart attack, as the Immigration Department said, and have accused the Department of covering up the circumstances surrounding the death.

Watch the ABC 730 investigation by Sarah Whyte and with research by Jarni Blakkarly here –http://www.abc.net.au/news/2016-05-13/detainee-given-visa-released-after-villawood-bashing/7407484