Winston Peters has gotten to the very heart of the vital matter of whether Judith Collins is guilty of such a serious conflict of interest that she would have to be sacked from the Cabinet forthwith.
In tandem with Labour's Grant Robertson, the New Zealand First leader has pieced together a jigsaw of separate events and happenings involving Collins, the milk-exporting company Oravida, and the Chinese border agency which blocked dairy imports after the Fonterra botulism scare last year.
It goes beyond Collins creating the "perception" of a conflict of interest — something the Cabinet Manual stresses Cabinet ministers must avoid and which Collins acknowledges her actions created.
The two Opposition parties claim enough information has now seeped into the public domain to suggest Collins had a real conflict of interest — one from which she stood to benefit from financially.
Unfortunately for Peters and Robertson, a rather vital piece of the jigsaw is missing.