The inquiry into the union and construction sector returned on Tuesday, with witnesses called to piece together the Cross River Rail site altercation that spilled onto a public road and culminated in a police escort.
Patrick O'Brien, who was site manager from January 2024 to the end of last year, gave evidence late Tuesday. He did not provide a statement and was instead taken through logs of a WhatsApp group chat of senior project figures describing union efforts to lock and blockade gates on April 30, 2024, as well as the transcript of his interview with inquiry staff from February.
Some messages showed O'Brien telling the group that a CFMEU organiser named Dennis had told him nobody was passing the picket line and "it will kick off if they try". Wood accused O'Brien of deliberately withholding evidence.
The Dutton Park incident came during an escalating campaign by the CFMEU against major contractor CPB, and followed a picket line established by some union members who had walked off sites, the inquiry heard.
In April, the inquiry released images of 15 men, some masked, seeking to speak with them to ensure "all relevant perspectives are heard" about the "confrontational protest". Earlier witnesses recounted their versions of the incident, its lead-up and aftermath through testimony and written statements.