By Maggie Tait of NZPA Wellington, March 8 NZPA - Police will treat politically sensitive allegations differently in future after complaints about how they handled investigations into how a journalist received former National Party leader Don Brash's emails.

Wellington, March 8 NZPA - Former National Party leader Don Brash says he appreciates police efforts to find who was behind his emails being given to a journalist , but accepts the culprit will probably never be found.

Wellington, May 22 NZPA - Author Nicky Hager believes a review of the investigation into how he got his hands on Don Brash's private emails will prove police did their best to find out.

Former National Party leader Don Brash has welcomed a high level review of the police investigation into how his private emails ended up in a book. Police Commissioner Howard Broad announced the review this afternoon, following a call by Dr Brash for a commission of inquiry.

Wellington, May 21 NZPA - A senior police investigator is to look into the Don Brash email case after continued concerns about how it was handled. Police Commissioner Howard Broad said a full review of the case involving the former National Party leader's emails would be done.