Iran recently executed a dissident, . It is claimed that , on vague charges after he was likely detained while on a visit to Iraq and forcibly returned to IranIran executes the most people in the world per capita (link to article with shocking photos). This includes also juveniles, which we have highlighted in particular on Accoun before, because it is against international law.
For years, many murders where other governments are believed to be responsible have also taken place in Iran. The latest is the deadly attack by a hit-squad on nuclear scientist Mohsen Fakhrizadeh, which is widely believed to increase the risk of an open war with Iran.
The tensions with Iran have also resulted in shooting down two civilian airliners: IR655 in July 1988 by USS Vincennes (for which the captain and the air-warfare coordinator were later awarded) and PS752 in January 2020 by Iran themselves (for which there appears to have been arrests of a person who posted a video of the missile strike and of low-level officials).
Update regarding PS752: https://www.hrw.org/news/2021/01/07/iran-no-justice-victims-downed-plane