lagenfeld, was there an answer you wanted to clarify. please do so. >> only to state that narcan, administering narcan to someone who potentially suffered a fentanyl overdose, once that individual is in cardiac arrest the administration of narcan would provide no benefit. >> at this point he was obviously in cardiac arrest. >> correct. >> you were asked questions just now about whether fentanyl works by causing someone to feel very sleepy. do you remember that discussion? >> yes. >> did the paramedics tell you that mr. floyd was ever asleep or sleepy or anything that sounds like sleep? >> the report that i received that was that the patient, mr. floyd, was unresponsive on their arrival and did not have a pulse, and so there was no report that he had been sleepy or difficult to arouse, per se. >> you were asked quite a number of questions about the carbon dioxide content in the blood gasses. first off, if a person is suffering from hypoxia which is oxygen deficiency is that an explanation for a heightened blood content in the blood? >> it