Summary: the pictures below show only visible wounds. Most wounds of directed energy weapons, like (high power) microwave weapons, ultrasonic weapons, do not show on the skin. They cook/destroy the body from the inside. Operators (people cookers) are trained to leave no evidence.
Click the image or here for details
Directed energy weapons transfer energy in an aimed direction in the form of electromagnetic radiation (radio waves). A number of these weapons can also hit a target through walls. Examples are (high power) microwave weapons (compare a microwave oven) and ultrasonic weapons (compare pulverize kidney stones). Today these weapons are being used by secret services to eliminate. Although often called non-lethal, some of these weapons have the capabilitiy to kill.
In general these weapons are applied in such a way that they leave no evidence. Most wounds do not show on the skin. They cook/burn/destroy the body from the inside. Operators, the people cookers, are trained to attack without evidence i.e. attack body part A some time, then part B, then part C, then part D, etc.
In some cases however visible effects are shown. This often happens when the operators are provoked and get out-of-their-minds wanting to shown the target a lesson. They increase intensity and duration leaving burns. At other occasions they just hit an area they thought the target cannot see.