go to the images tab at the top of their profile, click it, then find the pic just above it you will see edit/remove (Ithink that is what the choice is, lol) click it where you see edit/ then on left side below image where it says are you sure it is this person/thing in this image.. remove the info and remove the "certain" tap the circle so its no longer got color, go to bottom click save changes. Once you remove the person its connected to, it will delete the pic within a few mins usually