. >> so, chad approached kathleen zellner, a terrific attorney, and said, my brother needs help. >> innocent. >> i just thought he was somebody really worth trying to save. biktarvy is a complete, one-pill, once-a-day treatment used for h-i-v in certain adults. it's not a cure, but with one small pill, biktarvy fights h-i-v to help you get to and stay undetectable. that's when the amount of virus is so low it cannot be measured by a lab test. research shows people who take h-i-v treatment every day and get to and stay undetectable can no longer transmit h-i-v through sex. serious side effects can occur, including kidney problems and kidney failure. rare, life-threatening side effects include a buildup of lactic acid and liver problems. do not take biktarvy if you take dofetilide or rifampin. tell your doctor about all the medicines and supplements you take, if you are pregnant or breastfeeding, or if you have kidney or liver problems, including hepatitis. if you have hepatitis b, do not stop taking biktarvy without talking to your doctor. common side effects were diarrhea, nausea, and

>> kathleen zellner is known as an aggressive defense attorney. >> chief legal correspondent for msnbc entire case was done the wrong way. she's basically trying to put the state on trial. >> in her 45-page legal motion, zellner attacks law and for some, and tries to poke holes in the prosecution's case and raises new questions. >> she notes that teresa's cell phone pen dave cell phone tower 13 miles away later that day. suggesting maybe she left there alive. it also indications that maybe other people, not from law enforcement, entered the property during the investigation, raising the prospect of other potential suspects. >> and she's won an early round. in november, 2016, a judge granted her access to some of the evidence so her experts could perform new forensic tests, including more advanced testing on avery's blood from the rav4. in june, 2017, zellner filed a motion requesting a new trial for avery. in a statement, she told dateline, we will be able to demonstrate exactly how the evidence was planted in the early part of the investigation. avery, she insists, was framed for a cr