In crushes caused by a heavy vehicle, the lesions resemble in many respects those due to a fall from a height. Thus we find fractures and internal ruptures, but we more often and regularly find subcutaneous ecchymoses and ecchymoses between the muscles. The skin is often stripped up extensively and the injuries are generally limited to the region injured. It is rare to find that the cause of the injury leaves no trace on the skin, for it usually gives the form to the erosions or ecchymoses. Sometimes, for instance, the marks of a horseshoe are clearly visible. Ruptures of internal organs may occur here too when there are slight external marks of violence or even none at all. Thus Vibert[658] relates the case of a man with the head crushed, but with no signs of injury to the trunk save a few erosions at the level of the sternum, who had not only rupture of the kidneys, the liver, and the spleen, but also of the lungs and of the heart. In the heart the apex was completely detached and floating in the pericardium, which was intact. There was no fracture of the ribs nor subcutaneous or sub-muscular ecchymoses. The age of the subject was thirty-two, so that the costal cartilages were not probably ossified, which may have accounted for the absence of fracture of the ribs.
Crushes by the fall of heavy weights resemble the latter class of crushes, and differ from falls from a height in the fact that the wounds are usually limited to one region. The lesions themselves are more or less similar. Similar internal lesions may be caused by the compression of the chest and body by the knee of a murderer, which may occasion rupture of the internal organs, fractures of ribs, etc. Thus, too, from the pressure of a crowd the ribs may be fractured and the lungs injured. It is particularly in these cases of injury from crushes or falls from a height that we may have most difficulty, as far as the medical evidence goes, of distinguishing between accident, suicide, and murder. But the various points and considerations mentioned above will sometimes enable the medical witness to clear up the case. In some cases the non-medical evidence, circumstantial and otherwise, may be sufficient of itself, or at least in conjunction with the medical evidence.
In falls from a less high place the difficulty is somewhat different, for here there may arise the question between a fall and a contusion or contused wound, and the question generally lies between accident and murder, or, very rarely, between accident and suicide. We have referred to both of these questions above, and from the facts mentioned the case can often be solved.
Of more than One Injury which was the First Inflicted?
We can sometimes tell the order in which wounds were received, but the question is rarely answerable with certainty. If one wound is mortal and one or more are not, whether the wounds are suicidal or homicidal, it has sometimes been considered that the former must have been inflicted last. But we cannot admit that as a general rule the most grave wound was the last inflicted. For the murderer or suicide, especially the former, may go on wounding after the infliction of a mortal wound, especially as it is the exception, and not the rule, to die instantly after a mortal wound. Several assailants may have inflicted wounds at the same time, which would still further increase the difficulty. The question might then arise, Which assailant had inflicted the mortal wound or which had first inflicted a mortal wound? Under such circumstances, it would not be easy to give a specific answer. There are several signs which may indicate which wound was first inflicted in certain cases. An instrument may become duller or even bent or twisted after and on account of the first wound, and the subsequent wounds would vary accordingly. The wound of the clothes corresponding to the first stab-wound may be and often is only bloody internally, while the second and following wounds are bloody on both sides. The following case quoted by Taylor[659] from the Annales d’Hygiene, 1847, p. 461, illustrates this point. A man received three stabs from an assailant, one in the back at the level of the eighth rib, traversing the lung and heart and causing rapid death, and two on the left elbow, cutting the coat and shirt but only grazing the skin. The first one was evidently the first inflicted, for both the wounds in the clothing on the arm were bloody externally at the edges, although there was no blood effused here. The correctness of this opinion was confirmed at the trial.
The point of a knife arrested and broken off in a bone may show that this was the last wound. The amount of bleeding may show which was the first wound. Thus if several severe wounds have been inflicted, all or several of which would naturally cause profuse hemorrhage, and one showed signs of such hemorrhage while another did not, the former would be likely to be the first wound inflicted. Or if one showed slight hemorrhage where much would be expected, this fact would indicate that it was one of the last inflicted. The absence of the signs of spurting blood may tell which of two or more fatal wounds were first inflicted, for this would indicate that this wound was inflicted when the heart action was weakened by loss of blood or even after death, and the other wound or wounds which did not present this sign would have been the first received. In fact, if any of the signs are present about a wound which we have seen to indicate that a wound was inflicted at any time after death, this would show that this wound was not the first received, and that the other or others were inflicted earlier.
Questions as to the CONSEQUENCES of WOUNDS NOT FATAL may often be brought up in civil actions for damages. In certain countries the question of the consequences as to incapacity may determine whether an injury shall be the ground of a criminal as well as of a civil action. Thus in France an injury which involves an incapacity of twenty days or more subjects the assailant to a criminal action. The term “incapacity” in this instance refers to general incapacity and not to incapacity for fine and professional work. The latter, however, comes in under the civil action which may be instituted against the assailant or those directly or indirectly responsible for the injury. The amount of the incapacity, its causes, whether due wholly or partly or not at all to the given injury, the probable duration of the incapacity, the treatment which it has and will necessitate, and many other such questions form part of the medical testimony required in such cases. Sometimes with slight wounds the results, accompaniments, and complications may prolong the incapacity very greatly, as also the state of health and the habits of the wounded person, the neglect of treatment, improper treatment, etc.
Any bodily or mental infirmity or ill-health which may result from an injury and its necessary treatment in the past and future, all these questions and many more unnecessary to mention may be required of the medical witness. No general rules can be laid down for all such cases. In giving his testimony the medical man must depend in any particular case upon his knowledge, judgment, and experience.
We can seldom give a precise solution of the question of survival to determine the succession or inheritance if several of a family die together in an accident. In case of death from inanition, cold or heat, or in drowning especially, if some have wounds more or less grave in themselves, we can sometimes form an opinion. With wounds we cannot often do so, although in case of murder, the nature of the wounds, the position of the bodies, the examination of the spot of the accident or tragedy, may sometimes help us to form an opinion.