To start off with...
11 #12 Conductors in a box designed for 6 (assuming the box is 1-1/2" deep and not 1-1/4") Including the deduction for the clamps, there are 6 too many conductors in the box.
The box appears to be unsupported.
Scratch that... I see the bracket now...
The ground wires should be snipped off IF there is no "true" ground present in the box...OR if one of the 12-2-G wires is the feeder, the box isn't bonded properly.
The conductors do not have six inches of free length.
Are the cables stapled within 12 inches of the box? Doubtful, but inconclusive in the photo.
Less than 1/4" of jacket on th NM Cable in the box... (Some one told me that rule is only for plastic boxes...any comments?)
No Connector on the ground? (Crimp or wirenut) You did say that the wirenuts were removed, but the "ground" conductors don't appear to have the scars. (This same someone told me that twisting the grounding conductors together with no other means of connection is ok by code...sounds fishy to me...)
Was this protected at 15A or 20? There is one lone #14 Cable I believe...
That's about all I see...
