Link.
In short, Christian Pyles does the tough investigative work, looking at the mat assignments of particular referees to Russia, Azerbaijan, and Uzbekistan matches to note disturbing statistical anomalies, and laying the blame at chief ref Antonio Silvestri's doorstep, alleging that Silvestri assigns the matches, supposedly at random but clearly not.
In short, Christian Pyles does the tough investigative work, looking at the mat assignments of particular referees to Russia, Azerbaijan, and Uzbekistan matches to note disturbing statistical anomalies, and laying the blame at chief ref Antonio Silvestri's doorstep, alleging that Silvestri assigns the matches, supposedly at random but clearly not.