Papua New Guinea's public prosecutor, Pondros Kaluwin, says he needs "certain vital evidence" before he decides whether to ask the Chief Justice to set up a leadership tribunal to investigate the Prime Minister.
The Ombudsman Commission referred Peter O'Neill to the Public Prosecutor on three charges nearly two months ago, alleging breaches of the country's Leadership Code and misconduct in office.
Mr Kaluwin says he has fully considered the material presented to him by the Ombudsman Commission, but needs more information in order to decide whether or not to refer Mr O'Neill to a tribunal to conduct enquiries.