I have to say that I don't have expertise on biometrics.
As a tool, I think it's worth studying to evaluate its usefulness. Many of the people whom we deal with in detention have never been to Canada before, have often never travelled outside their country of origin, have never made a visa application. Biometrics wouldn't be helpful in identifying them. I really can't speak on biometrics with much authority, but I will say that when it comes to whatever tools CBSA does need to identify people, I would raise the question about costs, and whether with certain detainees there might be better alternatives, which would allow CBSA to pursue its investigation more effectively.