How to delete a photo on facebook ?

[Jessy]

I think you must have deleted the post, not the actual photo itself which means it's still on facebook.

To delete the actual photo, go on where you can find it, e.g your friend's wall, and click on the picture itself. Then it should come up bigger. Hover over the picture, and a toolbar should show at the bottom with:
-tag photo- -options- -share- -send- -like-

click options, and then click "delete this photo"
hope it helped