The relentless advance of technology is exciting. We truly are living in a world where science fiction is becoming reality.
Advances in technology mean that you can be recognised by the way you look, the way you walk, the way you speak, the way you move a mouse across a screen and now they are able to build a visual profile from markers found in your DNA.
It does note, that diet etc will have an impact as your features obviously change with a persons weight, but this would surely help witnesses build a better identity photo. They would simply adjust the DNA profile to correspond to haircuts, hair colouring, weight and distinguishing features like scars and tatoos.