A CFMEU administrator sent two teams of investigators away, despite their task to uncover corruption in the union.
The Albanese government's reform chief, Mark Irving KC, assembled the teams, but then disbanded them, leaving serious misconduct allegations unaddressed for months.
One source said Irving was concerned that seeking more powers from the federal government could risk reviving calls for the coalition's Australian Building and Construction Commission.
A former AFP officer, Chris Craner, was recruited to help investigate wrongdoing at the CFMEU, but the investigation was abandoned.
Author's summary: CFMEU administrator disbanded anti-corruption teams.