https://phys.org/news/2018-07-canada-genealogical-sites-deportees.html

Immigration lawyers, however, are concerned about law enforcement's collection of migrants' DNA and the privacy of data held by websites such as Ancestry.com and FamilyTreeDNA.com.

"The CBSA uses DNA testing in order to determine identity of longer term detainees when other avenues of investigation have been exhausted," spokesman Jayden Robertson said.