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 that in fact it was not the cause that. well it does seem that they are also trying to tackle this issue of whether mr floyd's use of opioids than the long term use could about tilly built up his resistance to other drugs where are they going with that well that's something that i think the experts will all concur and i know it's something i've seen in my own work is that when people use opioids for a long time they're built their body builds up resistance and they use more and more which of course increases the chances of an overdose and that's especially true with when to stop with the testimony previously from his girlfriend miss ross who said that he had gone clean for a while and then started up