Hackbarth v. State, 617 S.W.2d 944 (Tex.Cr.App. 1981). See also Hinton v. State, 626 S.W.2d 781 (Tex.Cr.App. 1982). Moreover, there was no evidence suggesting that the blood sample was tampered with or misplaced after it left Dr. Ray's sight.
The Court of Criminal Appeals has recently held the admission of such testimony is proper and does not necessarily show commission of extraneous offenses. Hinton v. State, 626 S.W.2d 781, 783 (Tex.Cr.App. 1982). Appellant also complains of trial court error in the admission of the confession because, according to appellant, it shows the commission of the murder of Mrs. Johnson, which was an extraneous offense.