Anybody running for president has was basically an after thought. Reporter clinton and sanders will face off at a debate in flint, michigan on sunday. Expect sanders to again be in attack mode, but secretary clinton has to be careful not to hit back too hard to alienate his supporters, the very voters she will need if she does make it to the general election. Lester . Kristen, thanks. After nearly 22 years, the o. J. Simpson case is back in the headlines with a surprise revelation that a knife was found years ago on simpsons former estate. This potential evidence was kept out of investigators hands until about a month ago. Tonight the knife is being examined by police, but sources are already casting doubt about whether it could actually be the murder weapon used in the double murder. Nbc dateline correspondent Josh Mankiewicz has more on the new twist in this still open case. Reporter today the lapd confirmed that one of their officers possession for some time, even though investigators were only able to take possession of it this past january. Its been submitted to our lab. They are going to study it and examine it for all forensics, including serology and dna and hair samples, and that is ongoing as we speak. Reporter the story police are being told involves construction workers finding the small folding knife while they were doing work on o. J. Simpsons former property in l. A. After it was sold to a new buyer. They gave it to a now retired Police Officer working off diet at a move shoot across the street. He claims he was told the case was closed and so he hung on to the knife for a number of years. It was brought to our attention that this retired overs had an item that was believed to or that was possibly taken from or recovered from the Rockingham Estate back in the 90s. Once we learned about that, we followed up and recovered that from him. Stand and face the jury. Reporter o. J. Simpson was tried for the 1994 knife murders of his exwife nicole and her friend ron goldman in a case that seemed to be on every tv set in america. In an interview airing this sunday, former prosecutor marcia clark speaks to dateline. Right off the bat thereto was a sense of loyalty of investment in protecting an africanamerican icon who had made it. He was successful. He had made it. They did not want to see him taken down. Not guilty. Reporter the defendant was acquitted despite significant evidence against him, but no murder weapon was ever found and now the fx series the people versus o. J. Simpson has surprised in the rightings as many people seem to want one more dose of a story that wont go away. This is not the first time a knife has made it to police. Other knives have been submitted over the years, but this is the first one said to come from the simpson property. Criminal trial is over, he was acquitted. The civil trial is over and he was found responsible. I dont see anyone prosecuting o. J. Simpson for anything related to this case again. Reporter ton multiple sources are expressing skepticism about the knife and about its possible value in the case in part because it may physically be too small to have left wounds on the victims and in part because its so tantalizing, because it surfaced at precisely the time that this case is once again on everyones lips. Lester . Josh mankiewicz tonight, thank you. And a programming reminder, date line will air the people versus o. J. Simpson, what the jury never heard this sunday at 9 00 p. M. Eastern. Closing arguments wrapped up late today in the erin andrews civil trial. The Sports Reporter is demanding 75 million after she was secretly filmed in a hotel by a man later convicted of stalking her. And beginning monday the case will be in the hands of the jury. Morgan radford. Erin andrews is a victim. Reporter erin andrews legal team making its last attempt to convince a jury that shes still emotionally damaged from the stalker video that was secretly recorded eight years ago at the nashville the trauma happens day after day and its never going to stop. Reporter her lawyers arguing that the former owner and management company, along with convicted barrett, should pay andrews 75 million for Emotional Distress and loss of privacy. Earlier this week andrews says shes still haunted by it daily. Its going to be on the internet until i die. Reporter but the hotel says it did not give barrett her room number and was manipulated in giving barrett the room next to andrews. Mr. Barrett is a criminal, a stalker, no doubt about it. Counsel is trying to client but had nothing to do with that guy. Reporter there were several pieces of evidence all leading up to this. Its all left up to the jury, seven women and five men. They are given guidance on how to assess damage but no fixed formula on how much to award, especially when it comes to emotional injuries. Even if a jury does side with andrews, they might not agree with the 75 million shes asking for. I work for a moving company. I make 50 grand a year. Thats a lot of money. Ill give her 50 grarngsd you see what im saying . The jury is going to put their perspective this case. Reporter the jury has chosen to deliberate on monday and court will resume at 9 00 a. M. Now, if they do choose andrews that means they will have to specify the amount of lester . Morgan radford in nashville, thank you. A newly unsealed autopsy report shows Bobbi Christina brown had several drugs in her system about she was found face down in a bathtub but it does death was a suicide, accident or homicide. Morphine, alcohol, prescription drugs and alcohol were all found according to the the daughter of the late Whitney Houston and bobbi brown was in months. She died last july and would have turned 23 today. The city of flint, michigan has finally put into action a plan to replace all of its lead pipes. The work began on the first of many homes to replace lead Service Lines with new copper lines. The mayor says the 55 million project could be completed been a year. A costcutting measure back in april 2014 led to flints water beinging tainted with lead. Still ahead tonight, peanut allergies and the new and unconventional approach that might were back with encouraging medical news in the battle against a growing problem in the u. S. Dangerous peanut allergies in children. New research out today could give new hope to parents of highrisk kids. It found that exposing children early, very early, may help them avoid peanut allergies all together. Nbcs erica hill has details. There you go. Reporter 3yearold cole was born with a high risk for a peanut allergy, but instead of keeping peanuts out of his diet. You like those things . Reporter coles father, an allergist, introduced them when he was just 6 months Scientific Evidence one way or the other about how to introduce peanuts to him so i just decided may as well just give it to him. Reporter its the same approach they took with older son calvin now 6. For years the wriz dom was that highrisk children should avoid peanuts, the most prevalent Food Allergen before the age of 2. How about one more . Reporter now research is showing what research showed early on. Theres an 80 allergies in individual infants and babies that were exposed to peanuts early on in life, so thats very revolutionary. Reporter two new studies published in journal of medicine further support the thinking. The first found most highrisk children who regularly consumed peanuts from the age of four months until age 5 remained allergyfree, even after avoiding peanuts for another year. In a second study, researchers found exposure to other foods at a young age, including eggs, yogurt, sesame and allergies. Very exciting to think that we can have an approach on particularly food allergies. Were not there yet. Reporter experts recommend consulting with your physician before introducing home. I got green. Reporter the schorer family is confident. Early exposure worked for their boys. A peanut allergy. As a father really made me better that i ended up probably dock the right thing in terms of giving cole and calvin peanuts early. Reporter peace of mind for parents and child. Erica hill, nbc news, new york. Up next here to get a little snow at one of the worlds bud collins has died. For almost half a saleofthecentury collins was the voice and face of tennis on american television. After writing about boston globe, he began to work on tennis broadcasts in the late 1960s. First on cbs and then for decades on nbc including the longrunning Wimbledon Program with. Commentary and colorful outfits he helped to popularize tennis and make it successful on tv. The folks at linkedin are going to be getting a Little Something extra in their paychecks in hopes they will stay on board. The company said this week that ceo jeff weiner is giving up his annual bonus, a stock package reportedly report 14 million so his employees can share it instead. The move follows a disappointing Earnings Report and a big drop in bindingins stock price last month. And in alas cat iditarod sled dog race conjures up images. Frozen north and lots of snow. Not so much this year. They had to ship in tons of the snow for the start of the race. In anchorage since last july 27 inches of snow have fouled in the area compared to the normal 60 inches. Even with the special delivery they still had to shorten the track by more than half. When we come back, he is feeling the weight of the world again, scott kelly set an american record with his 340day mission to the International Space station, but today as tom costello reports kelly admitted his reentry to planet earth has been a than he expected. Reporter gang back on the ground for less than 24 hours scott kelly says hes still adjusting to life in one g. Coming back to gravity is harder than leaving gravity. Reporter after a nearly a year in space hes far more fatigued, his muscles much more sore than he was after an earlier fivemonth issue. I also have an issue, you know, my skin because it hadnt touched anything for so long, like any significant contact, its very, very sensitive to almost like a burning feeling wherever i like sit or lie or walk. Reporter doctors say he may also have trouble sleeping at first as he readjusts to a normal daynight sickle. His muscles may have weakened in space and bones often become more brittle, and he says he actually grew one and a half inches in space because the spinal column wasnt compressed by gravity, but hes already normal size. Gravity pushes you back down to side. Reporter a big part of this mission, studying the Health Effects of Long Duration space flight for a future mars mission, comparing scott with his twin brother, former astronaut mark kelly back on earth, both undergoing exhaustive medical exams both in space and on ground and mark kelly today. They have already taken 30 samples of blood. Today. Reporter just today . 30 tubes. Reporter along his 144 million mile journey his tweets with stunny photography quickly went viral. Back on earth his first meal was a banana, and after a year without a shower he dreamed of jumping back into his pool in houston. Meanwhile, that whole gravity thing is taking some time. I tried to shoot some basketballs yesterday, and i didnt get any of them in the in the net. Reporter settling back in after a year up there. Tom costello, nbc news, houston. That will do it for us on a friday night. For all of us at nbc news, thank you for watching. Good night and have a announcer the following is a paid presentation for the nuwave oven pro, brought to you by the makers of the nuwave precision induction cooktop. [. ] professional chefs create greattasting meals from years of experience and by using professional equipment. And now you can too, with the nuwave oven pro, the numberone countertop oven in america no more defrosting or preheating that giant oven the nuwave cooks all your meals faster, better, healthier and easier, guaranteed. The nuwave oven is not a microwave oven, but uses conduction, convection and infrared power simultaneously. It cooks food up to 50 faster than a conventional oven, while using up to 85 gourmet meals made easy, saving you time and money. The nuwave oven is a new way to cook. Its energyefficient, it saves time, it makes food deliciously. Announcer its also been tested and proven that food cooked in the nuwave oven has less fat, but more natural juices great for anyone who wants healthier and bettertasting meals for their family. And since the nuwave oven pro is dishwashersafe, cleanup takes seconds. The nuwave oven pro has been tested and recommended by the cooking club of america and the National Health and wellness club. Join host joe fowler and and tv cooking expert heidi bohay as they show you how you can make every meal of the day, and find out how you can take advantage of a limited time neverseenbefore buy one, get one free offer on the nuwave oven pro. Im so happy to be back here with you this is a phenomenon its the numberone infrared cooking device in the world we personally know about the incredible it is, but for those of you out there that dont know about the nuwave oven yet, you are in for such a surprise oh, you sure are. This is a Great Appliance what do you have for us . Well, i have something i know youre gonna love. This is one of the easiest meals, healthiest and most delicious. One of my favorites to make in the nuwave. Well, its a nuwave oven meal we know its gonna be good. Thats right. O. K. , a bag of frozen chicken breasts. Frozen . Thats all you need. Frozen. Frozen . Dont believe me . Well, i do but lets prove it to everyone else. Im gonna show you how frozen they are. [bangs on counter, both laugh] o. K. . That would be frozen. That would be frozen. All right, now im just gonna put a few right here on the grill. O. K. As you know, i have three children. It saves me tons of time, it makes my meals easier, it makes them. Better. Healthier. Then you just take some of your favorite veggies i happen to be using some carrots. Love em. Zucchini. Especially in the nuwave. Right here, just layer it all around your chicken. Talk about a healthy meal, heidi oh, talk about a healthy meal and an easy meal. And here are some potatoes. Now what im gonna do. This is so good is im gonna just put a marinade. What i love your protein. Right. From the chicken, you have your veggies and you have your carb or your starch in the potato. And you didnt defrost the chicken. Nothing. You didnt preheat an oven. From frozen. Can i start . Put the top on. O. K. All right, now the big question. Mmhmm. How much time will it take . 13 minutes. Im gonna touch and go. Touch and go. One, three. 13 minutes is all it takes in the nuwave oven thats right, and im grilling the chicken, im also broiling and im roasting at the same time. No other oven can do that. Thats it. Now take a look at this. We set up our timelapse camera to see how the nuwave cooks these chicken breasts from frozen to fabulous in only 13 minutes. We are done. Its finished, o. K. All right, im going to just put this on a plate right here. Oh, thats beautiful. Now watch the way this piece of chicken cuts right here. That is so gorgeous. Look at that. Here you go, im gonna let you taste that. Perfect. Amazing. Amazing. 13 minutes. Mmm. It is. Its delicious. Because i have two jobs, im always on the go. My main thing is grabbing something out of the freezer and i can have a healthy meal in minutes. By taking something from a frozen state to a cooked state very quickly and using the nuwave oven, you come out with a product that is safe for the consumer, greattasting every time. Youll love it. Joe im in heaven [laughs] heidi now, listen, joe, this is every meal of the day. All cooked in the nuwave. All cooked in the nuwave, plus more. Well start with breakfast. Youre doing quiche, eggs and Cinnamon Rolls all together. Heres what im doing Cinnamon Rolls, exactly, right on the top, the quiche and the hardboiled eggs on the bottom. [joe chuckles] o. K. . Also weve got waffles we can do, sausage, bacon, bagels. All right, lets come on down here, well go to lunch. O. K. Fries, burgers. Burgers. Pizzas an alltime favorite. All right, shall we move on . Lets go to dinner, and i have a little interest in this. You know im not a cook per se. N you buy the nuwave oven, you get this this and you just said something very important. Whats that . I think for a lot of people,nt cook. Look at that. But the nuwave cooks it for you. For you. Perfectly every time. Yes. You dont have to do anything. Im like a gourmet chef. It gives you all the tips. O. K. , so. Great, great. Look at all of it. Weve got some lobster. Lobster. Some shrimp. Tbone steak. Steak. Lamb chops. At the, the vegetable medley. Those are beautiful. This is a family favorite. I know your family loves this one too. Oh, for sure. Salmon, lemon pepper salmon. T beautiful . You know what . You made salmon and asparagus for me in the first show. Yes, i did. And im doing it for you in this show. flake a little bit off there just so we can see it. All right, lets do that. Look at that. I just followed the instructions. Wow. Oh. Oh [laughs]ce. Wait, i want a fork too mmm. Its the nuwave oven. You talk about healthy. All right, now were gonna move on to dessert. Which we have right here. Yup. Cookies are one of my favorite things to make for dessert in the oven. Away all the time when i use it. Squares. Yeah. Cobbler, pineapple upsidedown cake. Look at this everything you see here, nuwave oven, fast, easy, quick i love this. Ol p. E. Teacher and knowing how kids are hungry after they get home from school activities, the nuwave would be an excellent thing for to have. The students come home, its healthy, its fast, its easy. Dont waste your time and energy slaving in the kitchen. Ast food or unhealthy microwave meals make a smart decision. Make greattasting food faster and easier, save money andhy lifestyle. Its time for you to pick up the phone and order your very own nuwave oven. Announcer the reviews are in er the country are raving about their nuwave oven because it makes all their meals easier, faster and healthier. Comparison. Its so easy, so convenient. I can eat fast food,food prepared quickly. Announcer dont crowd your kitchen with gadgets that only do one thing. Omplete kitchen all in one. It can broil, roast, grill, bake, barbeque, steam, dehydratein one small countertop appliance. The nuwave oven is not a microwave oven, but uses conduction, convectioner simultaneously, cooking foods from the outside and inside at the same time. This cooks food up to 50 fasterl oven, while using up to 85 less energy. The nuwave oven is a new way to cook. Its energyefficient, it savesliciously. Announcer the result . Healthy, gourmet meals made