The Chicago Tribune reports that federal prosecutors have opened a criminal investigation of monies received by Conrad Black and David Radler while they were running Hollinger International Inc. of Toronto. Investigators are trying to determine whether the two engaged "in the pilfering of corporate assets," the unidentified source told the Trib's reporters. Black and Radler are the guys I used to work for. They were the controlling shareholders behind Southam Inc. when I worked for The Hamilton Spectator and, later, they were the ones behind the National Post, where I was part of the inaugural staff.