Comment by pear01

You mean the the case where he came to her door dressed like death with his face almost completely covered?

Pretty extreme bar your setting. I would think most people would agree it could still have extremely (and surprisingly) potent accuracy and still fail in this case. I wouldn't expect facial recognition to work in a case when there is little to no face to work with... if that guy came dressed like that to any airport or mall he would've been detained immediately.