13 December 2017 :

A 35-year-old inmate identified as Sayad Ahadi was hanged on the morning for murder charges in Ardabil Central Prison. Having been on death row since four years ago, Sayad Ahadi was transferred to solitary confinement in preparation for his execution on December 9.
Absence of classification of unintentional murders in Iran lead to capital punishment for everyone committed murder, intentional or unintentional.