Australian MP Andrew Wilkie has found what he described as “potentially very hard and indisputable evidence” to pin casino operator Crown Resorts Ltd. to pokies tampering.

Wilkie announced on Tuesday that he is in possession of Crown-branded ‘picks’ that were allegedly used by a former high-roller to jam poker machine buttons in order for gamblers to have uninterrupted games, according to The Guardian report.

Copies of the supposed Crown picks, as well as punter loyalty cards, have been submitted to the Victorian Commission for Gambling and Liquor Regulation (VCGLR) to help the state regulator with its ongoing investigation, according to Wilkie.

Wilkie also informed Victoria Police Chief Commissioner Graham Aston about the tampering claims through a letter.