The audit concludes that most investigators had not completed core training, which "could be negatively impacting the quality of investigations."

The audit says no investigator working under the $35 million criminal investigations program had completed the full set of required courses — and less than half of them had completed the CBSA's introductory course, called "Foundations of Criminal Investigations."

"The impact of no training is significant," said another CBSA employee quoted in the audit report, "because you're not supposed to enforce legislation without training."

It's not clear what the current rates of completion are for CBSA investigators.