In Session The witness and the jurors return to the courtroom. “If we could just go through the injuries found by Dr. Mitchell at the first autopsy . . . there’s a one inch blunt laceration on the scalp?” “Yes.” “That’s where you’ve testified she struck her head on the tub?” “Yes.” “In your book, you suggest that smooth surfaces tend to produce irregular, Y-shaped injuries?” “Yes, that’s right, they tend to.” The witness is then shown a photo from one of his books, showing a laceration caused by a blow from a baseball bat. “That type of laceration is very similar to the one on Kathy Savio’s head?” “That’s right . . . but it just depends; there’s variations.” “You have no idea if she even did fall how she fell? The angle that she might have hit something, you can’t know that for certain?” “To a degree, it’s chance . . . the problem with the head is it’s a round surface with some flat areas . . . so the laceration that’s produced, you can’t say exactly what it’s going to be . . . if you hit somebody in the head, you generally get a linear laceration.”