Australian federal police have spoken to Opposition Leader Malcolm Turnbull about the "Utegate" fake email affair.
The police want to know who created the fake email, which indicated Prime Minister Kevin Rudd was seeking favours for a car dealer mate.
The Opposition knew about the email early and used it to point the finger at Rudd.
The attack backfired, leading to a horror week for Turnbull. He vowed his team would be more careful in the future after the email affair, appearing to broaden responsibility by using "us" and not "me".