I think you're spot on. For anyone interested in a more in depth (yet accessible) view of legal procedure, evidence, and trial practice, readers might benefit from Making Sense of the Rules of Evidence and Preparing Your Case for Trial, a web page article on the site of The Law Offices of William Markham, a California litigation firm. The firm represents businesses and executives, but its practice is not limited to the civil side of their clients' litigation needs: "white collar" criminal defense is part of their services.First the data set has to be given to the defence as part of the discovery. Prosecution and defence experts may analyse the data - those reports and analysis need to be provided to the other side as part of discovery before trial.
For the trial, the prosecution will exhibit the relevant parts of the Telematics data set and/or any special reports.
When i went to law school, the relevant witnesses would then produce these exhibits into evidence. The process is somewhat mechanical due to the need to establish foundation, authenticity, chain and custody etc
So the prosecution doesn't just say "here's the telematics judge!"
Rather a witness has to establish that BM's truck was seized. Then another witness has to establish that the telematics were downloaded from the truck and that the data exhibited is in fact the data recovered from the truck ... etc. Of course in practice a lot of this stuff is streamlined to avoid wasting time calling every witness under the sun on matters both sides agree on. So for example, one of the investigating officers produces multiple things.
At least that's how i learned it all.
I would add one wrinkle from my observations. In most cases, when the case is ready for trial the judge will issue a pre-trial order that requires - among many other things - that the parties stipulate the admissibility of evidence so that the case can be presented without interruption. The order also commonly includes pre-trial rulings on such issues so that objections need not be raised and resolved during the trial. I don't know whether such an order has been or will be issued in People v. Morphew, but if it isn't I think the risk of a chaotic trial will go way up. It would also raise concerns about the Judge's courtroom management IMO.