Kacavas acknowledges that it was possible that Exeter's physicians, nurses, or others who worked with Kwiatkowski suspected or knew that their patients were not getting correct dosages of fentanyl, and that they may have observed patients exhibiting symptoms of agitation during their procedures. He also acknowledges that he is investigating whether anyone else at Exeter Hospital knew of a trend or an anomaly indicating that prescription medications had stopped working as they were supposed to and reported it, and what happened to those reports.
"While these charges have been laid against the defendant," Kacavas says, "it is just a point in time in the legal continuum. We are continuing to investigate this case, and there is no individual or no entity that we are excluding as a potential target of our investigation. ...You can draw the inference from that, we're looking at everything."
The U.S. Attorney's Office has interviewed "the large majority of victims in this case," he says, and "although the patients don't have a great recollection of whether or not fentanyl had its intended effect at the time of their procedure, what we're doing is using medical records to show how many micrograms of fentanyl were administered, say, to this particular patient on this particular date."