His wealth was connected to the patronage of the hardline Iranian government and his willingness and ability to help them evade international sanctions. In that

His wealth was connected to the patronage of the hardline Iranian government and his willingness and ability to help them evade international sanctions. In that, he's a bit like the Chechen operators who murdered Nemtsov and didn't bother to cover their tracks because they assumed they were protected by the Kremlin.