Two teams of investigators with integrity experience were assembled to uncover graft in the union, but were swiftly disbanded.
The Albanese government's CFMEU reform chief, Mark Irving KC, abandoned the anti-corruption teams, leaving serious misconduct allegations untouched for months.
Suspected crooked officials took key roles within the embattled union during this time.
Irving was concerned that seeking more powers could risk reviving calls for the coalition's Australian Building and Construction Commission.
Author's summary: Corruption investigation in CFMEU halted unexpectedly.