"The family has put in a request for a post-mortem," Arash Keikhosravi, lawyer for the family of Iranian-Canadian Kavous Seyed Emami, told the reformist Shargh newspaper.
He said the coroners office had also put in a routine request for a post-mortem.
Emamis family were informed on Friday that the renowned professor and founder of the Persian Wildlife Heritage Foundation had died in custody just over two weeks after being arrested on espionage charges.
"In the film you see that Kavous Seyed Emami is taking off his shirt and is getting prepared for suicide," Borujerdi told the parliament news agency.
"His family too have accepted this incident and so have not asked for an autopsy," he added.
However, the family's lawyer told Shargh: "I do not confirm Mr Borujerdis remarks that the family did not request a post-mortem."
Emamis son Ramin, a well-known singer, said on Instagram that the family had launched a legal complaint over the death.
He said the family was due to receive the body on Tuesday and that a funeral would take place in the village of Ammameh, 40 kilometres (25 miles) north of Tehran.
Asked about the family's reaction to the film, their lawyer said: "There are scenes showing Mr Seyed Emami in his solitary cell.
"Apparently it has been thought that Mr Seyed Emami committed suicide there but there is not enough evidence."
The environmental community has also been rocked by the apparent detention of Kaveh Madani, deputy head of the Environmental Protection Organisation, over the weekend.
He was back at work yesterday and released a cryptic message on social media saying: "I am safe".
A well-known water conservation activist trained in the United States, Madani was plucked in September from his job at Imperial College London to join the government, and was heralded as a symbol of President Hassan Rouhanis efforts to encourage the return of Iranians from abroad.
Emami is the second Canadian citizen to die in Irans prisons following the murder in 2003 of 54-year-old Zahra Kazemi, who had been arrested for taking photos outside Evin prison.
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