The results of a ministerial inquiry into the case of a Malaysian diplomat who left the country with immunity are "disappointing", Foreign Minister Murray McCully says.
The minister had been advised not to release the report by former Treasury Secretary John Whitehead until court proceedings against former defence attache Muhammed Rizalman bin Ismail were completed.
Mr McCully said the conclusions reached by Mr Whitehead were "not surprising, but they are disappointing".
"At the heart of the matter is a single email, events surrounding which are carefully canvassed by Mr Whitehead's report."
He said that because of a number of "procedural shortcomings", the Ministry of Foreign Affairs and Trade (Mfat) led the Malaysian Government to believe that Rizalman could return to Malaysia despite facing assault charges.