RAMIN Pourandarjani was a brilliant medical student with a promising future, until he was found dead in a dormitory at Tehran police headquarters last week.
He is now the new cause celebre of the Iranian Opposition, with MPs and Western organisations demanding an investigation into the death of a man who knew too much.
The official cause of death for the physician is heart attack but there is  evidence that regime officials drove him to suicide or murdered him because he  witnessed the brutality used against opposition detainees after the disputed  election in June.
Dr Pourandarjani, 26, attended a school for gifted  children, graduated with distinction from the University of Tabriz and was doing  his two-year national service at the Kahrizak detention centre in Tehran during  the June protests.
Many detainees were beaten and at least three died of  their injuries, including Mohsen Ruholamini, the son of a senior conservative  politician. His death provoked such an outcry, even among the regime's  sympathisers, that Ayatollah Ali Khamenei, the Supreme Leader, was forced to  close Kahrizak on the pretext that its facilities were sub-standard.















