I'm not aware of the memo you're referring to. However, on a general level, we find the concern is still the same. Individuals are very hesitant to come forward and provide evidence to us. Generally when they do come forward, it's when their immigration application has failed.
We have tried to discuss this with people when we look for witnesses with respect to a criminal investigation. They are generally very hesitant. They are afraid. They view any questioning by CBSA as a possibility of their being deported from the country and they generally refuse to provide any evidence, so it remains a concern.