VF,
Hanging the 'tail rotor' over the edge is not a normal practice on EMS pads, especially with a BK117 where the stretcher has to be wheeled out of the clamshell doors under the tail boom. There are safety procedures in place to prevent this sort of accident; no doubt it will transpire that the procedures were not followed or modified in some way to allow the deceased to come near a rotating tail rotor/fenestron.
Indeed if it was a BK117 then the tail rotor is usually too high to be contacted by any but a very tall person.