Comment by simoncion

> Could you cite a source for this?

Many states (something like half) in the US don't require people to respond to police requests to identify themselves.

While the courts might end up claiming that being grabbed by several cops and having an iris scanner forced onto one's face is "not testimonial" and therefor not covered by existing laws that permit one to not have to identify oneself, I would argue that such an outcome is -heh- rules lawyering and intensely unjust. IMNSHO the justice system should actively avoid producing unjust outcomes.