of the executive office for united states attorneys guy lewis and criminal defense attorney joseph marronestart with derek chauvin, he's facing up to 40 years in prison after the charges were upgraded from third-degree murder to second-degree murder. it is certainly a step in the right direction for george floyd's family who wants him to be charged with first-degree murder. but, guy, i'll start with you, does this upgraded charge make it more difficult for prosecutors to secure a guilty verdict? >> that's a great question, kristin. in some ways it does. they've charged probably the most aggressive charge that the facts would allow. and i wish i could tell you that the hard part was behind us, but it's not. now we move into the litigation phase, and there's going to be very good lawyers who come in and contest these charges. and even though you've got the video right before you, these lawyers are going to say, look, we don't know what happened before, we don't know what happened after. the m.e. reports are contradictory, and so there's a lot of work to do here to move this case forward. kri