what's now the 2nd week of the trial so far he's testified that when mr ford arrived in the critical kariya he was in cardiac arrest that his heart had stopped he's so far been described in the medical procedures that were carried out and he's also been testifying that his initial assessment suggested that mr floyd had actually died from hypoxia at a lack of oxygen that that was the most likely possibility let's now go back to mark he's a law professor at the university of st thomas he joins us now from minneapolis professor thanks from for joining us again the focus from the defense there on surprisingly has been very much on the fentanyl and mr floyd system and how that could have affected his condition. yes one of the things we're seeing here is that both sides are using dr einfeld as a fact witness and we saw the prosecution get out certain facts that they will use and later argument in connecting up with their own experts now the defense is doing the same and cross-examination sort of trying to show him to be a liar something to bring out these key facts that will support their theory