30 A.2d 325 | Pa. Super. Ct. | 1942
Argued October 30, 1942. Indictment charging defendant with fornication and bastardy. Before McCREADY, P.J. *165
Verdict of guilty and judgment and sentence thereon. Defendant appealed. This appeal raises two questions:
(1) Was it error for the court below to refuse to admit in evidence on the trial of an indictment for fornication and bastardy, a letter written on behalf of the defendant to the mother of the child, requesting her to submit herself and her child to a blood-grouping test, supervised by competent medical authorities, in an effort to determine that the defendant was not the father of the child, and her refusal to do so?
(2) Did the court err in refusing to permit a doctor called by the defendant to explain to the jury the use of blood-grouping tests and the extent to which they are used in the medical profession, for the purpose of determining that, in certain restricted situations, it is possible to tell with certainty that a person of a particular blood-group could not be the father of the child — in other words, that by said test parentage cannever be proved, but that in certain cases it can be disproved?
The answer to both questions is, No.
We agree with the learned court below that the case is governed in principle by the decision of this court in Com. v. English,
The principal ground relied on by us in that case was that the proposed test is not the equivalent of an inspection of the body, but is a minor operation, involving the insertion of a needle in her body and that of her child and the taking from each of them of a small quantity of blood for microscopic examination, testing, and grouping, pursuant to certain complex biological processes1; and while the "operation is not regarded as entailing any serious danger to the health of the patient it cannot be said that there is no danger for there is always present some risk of infection."2 Certainly, such a thing done forcibly, against her will, would be a serious assault and battery.
But we also pointed out, what is admitted in the second question involved, as above stated, that while the test, in a very limited proportion of cases, might prove that the defendant was not the father of the child, it could never be of any probative force to show that he was the father. Professor Wigmore, says on this point (p. 619): "To sum up, in the case of certain progeny-types, this negative proof, amounting to conclusive demonstration of non-paternity is feasible. Butaffirmative proof of paternity is not feasible by the methods above described; nor is the blood-type-evidence in such cases even a probable indication (except in the rare theoretical case above noted par. II, 4), and therefore *167 should not be used in judicial proceedings". And advocates of the compulsory use of such tests would restrict their use to cases where they showed the impossibility of paternity.3
In such case the putative father would have everything to gain and nothing to lose by the test, while the mother would have everything to lose and nothing to gain by it. The man's `pitch' or `throw' would always be "Heads I win and tails you lose."
As the probabilities of proving non-paternity vary from one in seventeen for blood-group A — which represents approximately 42% of the men in the United States — to one in five for blood-group O, which represents 45%, and one in seven for blood-group B, which represents 10%, and one in two for blood-group AB, which represents only 3%,4 it can readily be seen that there is no reliable standard for determining the probability of provingnon-paternity unless the man's blood-group *168 is known, and then as to 97 per cent the probabilities would vary from 6 per cent in A, to 14 per cent in B, and 20 per cent in O, and would be of no probative value whatever in the remaining 94% for A, 86% for B, and 80% for O.
A general percentage calculated on constituent percentages would, of course, be mathematically incorrect.
No court would think of admitting finger prints in evidence to convict or acquit a defendant, if the probability of their being of probative effect was only one in seventeen, or one in seven or one in five, or anything short of one hundred per cent; nor would photographs or other such forms of evidence be admitted unless they presented an exact likeness of the object rather than only a slight degree of similarity to it.
Professor Wigmore says (p. 612), "The progress of science will no doubt make it possible from time to time to increase the range of the cases that afford decisive proof, both negative and affirmative." It was this thought that we had in mind when we said in the English case (p. 169): "Until the legislature finds that blood-grouping tests have attained such scientific standing as to possess probative value as to paternity [and not merely non-paternity] and that the ends of justice require action by it, and the legislature acts, the courts have not the power in a criminal case such as this to compel a prosecutrix or other witness to submit her body for blood tests." (Italics supplied).5
It follows, as a corollary, that until such blood-grouping tests have, through the progress of science, been so perfected as to afford decisive proof, negative and *169 affirmative, as to paternity, the refusal of a witness to submit her body and that of her child to blood tests, should not operate against her or be received in evidence as weakening the credibility of her testimony.
The assignments of error are overruled and the judgment is affirmed; and it is ordered that the defendant appear in the court below at such time as he may be there called and that he be committed by that court until he has complied with the sentence, or such part thereof as had not been performed when the appeal was made a supersedeas.