By now everyone will have heard that the police have executed search warrants on Taito Phillip Field's home, electorate office, and Parliamentary offices. The latter is particularly interesting due to the interaction with Parliamentary Privilege. The freedom necessary for Parliament to do its job (and the bad history of the monarch trying to arrest "treasonous" MPs) has led to Parliament asserting its power over police operations within the Parliamentary precinct. There's a report on the draft agreement between the Speaker and Police Commissioner from the Privileges Committee here [PDF], but it doesn't seem to cover actual searches. The Speaker has therefore been forced to draw up an additional agreement, which seems to require that they be accompanied by Parliamentary Services staff. I'll try and get a copy and see whether it has anything interesting in it.
In the meantime, Field must be coming under intense pressure to resign, if only to avoid dragging his Labour colleagues even further into the muck. But given his past behaviour, I'm not holding my breath.