The state gambling regulator failed to provide crucial documents to the NSW Crime Commission – including profiles of people who may have used poker machines to launder money that was the proceeds of crime – during the commission’s investigation last year.

The documents were unearthed during a parliamentary call for papers by independent MP Alex Greenwich, acting on a tip that the crime commission inquiry codenamed Project Islington had underestimated the extent to which pokies were used to clean dirty cash in pubs and clubs.

Liquor and Gaming NSW searched their records in response to the standing order and identified 8497 relevant documents, which Crime Commission staff then reviewed before they were released to parliament to ensure there was no breach of its confidentiality.