The CIA's Torture of ex-CIA Physician Sue Arrigo, MD
Electrical torture and stun gun injuries are almost identical. Electrical torture often uses stun guns and specialized electrodes which can be inserted into private orifices. The Handbook of Forsenic Medicine states;
 

"When a stun gun is activated while in contact with human skin, characteristic, patterned injuries may result:  The lesions produced tend to be small, round or slightly linear abrasions or areas of erythema [redness], with or without central paling, which occur in pairs.  The distance between the paired skin lesions should correspond to the distance between the stun gun electrodes contacting the skin. 

Microscopic sections may show non-specific changes, or changes similar to thermal heat injury of the skin."

[Note that electrical torture can use electrodes of many different sizes for specialized parts of the body.  The CIA prefers to use torture inside private orifices where the results will not be visible at all to casual observers.  Most of the torture I have been subjected to was of that variety.  I have some pictures of the injuries left to my perineal area, where the injuries are quite obvious also, but it is inappropriate to display them here.]
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