As far as I know, there isn't a problem here. > [...] of dubious legality because it's a biometric search and should be done in a criminal case [...] That is

As far as I know, there isn't a problem here. > [...] of dubious legality because it's a biometric search and should be done in a criminal case [...] That is not the law. You have been misled, perhaps as the article's author intended. The author's feelings on whether such searches should be legal are not the same as democratically-enacted laws on the matter.