I think a major problem you may be having is the word "science."
Science doesn't always happen in a lab with beakers and bunsen burners, or biology or physics. There is also behavioural science - linguistics is a science.
I can still hear my Year 7 teacher at the front of the room saying "there are two groups of sciences. Life Science and Physical Science." and I can still remember having to make a list under those 2 headings. I am a Grandmother now, I wish I could forget this, it had been useless my whole life - until now lol
JB should study nomology
I don't quite understand your "foul play" versus "homicide."
Homicide IS foul play. Foul play is "unfair or treacherous conduct especially with violence." (I think that is from dictionary online). You then mentioned hat a scientist may think ... that's when we go back up to the first paragraph.
My keywords were "indicate" versus "definitively demonstrate"; sorry for the confusion. I haven't seen anything yet that fully explains why Dr. G would say this proves or even necessarily demonstrates homicide rather than simply indicates it. I'm not saying she doesn't have a basis for that, I just wish she had explained it further. That's all.
I really hope this doesn't sound snarky; if it does, please forgive me: Yes, I'm aware that behavioral science is a science. I'm aware that not only is behavioral science a science, but so are history and economics and a host of other disciplines that perhaps the general public does not usually associate with science. (The latter two fall under the social sciences, of course.) So, yes, I do understand that not all science is conducted in a laboratory. I have a PhD in a social science discipline, and my long experience within academic institutions has made me well aware of the different branches of science.
I will concede, however, that I did not realize that medical examiners relied extensively on behavioral science in order to determine manner of death (until she said so on the stand); I was surprised by that, actually, though I have no reason to doubt it. When I questioned how her ruling was determined scientifically, I suppose I was referring more to some other statements she made that do not, at first glance, seem like facts that can be verified scientifically: "100% of accidents are reported" and "a child should not have duct tape on its face." I've no doubt that all accidents should be reported and that no child should have duct tape on its face, but these seem, at first glance, less verifiable facts than assumptions or beliefs. I'm sure Dr. G could explain further; she didn't get a chance to do so, however.
Still, I'm not impeaching this witness! As I said, I found her likable and credible. However, I had some questions about her statements that were not cleared up in direct or cross. I stand by my original assertion that I wish her ruling, based on those three red flags, could be further explained, and that it does leave some room for debate. She ruled the death a homicide of undetermined means; in a death penalty case that seems to depend on whether the death was a homicide or an accident, of course that's going to be debated. It's just not airtight, though nobody has said anything on the stand so far to discredit it. JMO.
And let me state, for the record, one more time: I found Dr. Spitz to be a terrible witness and I find Dr. Garavaglia's findings infinitely more credible.