Gohar Eshghi, the mother of Sattar Beheshti, told RFE/RL’s Radio Farda that authorities have not allowed her to see her son's body.
She accused authorities of torturing her son to death.
Iran's parliament called on January 6 for a special inquiry into Beheshti’s death.
The 35-year-old Beheshti was arrested at his home in Robat Karim on October 30.
He died several days later after complaining he'd been tortured by his interrogators.
His family was informed of his death on November 6.
Beheshti's death has led to several arrests and the dismissal of the head of Tehran’s cyberpolice, which reportedly arrested him for his online activism.