Through vandalising statues and burning pictures of their leaders, the Iranians are becoming increasingly bold in voicing their discontent and ignoring the regime's 'red lines'.
If his murder goes unpunished, it would be like 'giving the green light to the killers, whoever they are, to continue' their crimes, Slim's widow, Monika Borgmann, said.
The letter accuses Iranian President President Ebrahim Raisi of being among the main perpetrators who 'continue to enjoy impunity'.
Observers say Iran would likely open the bridge to civilians to camouflage its activities and prevent it from being targeted with military strikes.
Some 5,000 people accused of drug trafficking and abuse were detained in the region in 2021, double the number of drug arrests in 2020. Most drugs are smuggled in by Iran-backed groups.
Local tribesmen in areas controlled by the Houthis say the group has been cultivating cannabis and creating other illicit drugs to fund its war effort.
Journalists working for the BBC and other news outlets outside Iran have faced threats, criminal investigations, unlawful surveillance, freezing of assets, defamation and harassment by the regime.
Prosecutors say he oversaw rape and sexual abuse, 'electric shocks', beatings with 'fists, wires and whips' and 'sleep deprivation' at the prison.
The torching of the statue is a sign of growing discontent with the regime prioritising foreign expansionist plans over the well-being of its own citizens.
The recent death of Iran's ambassador to the Houthis also has brought to light growing friction between the group and its backer, Iran.