Lester holt. Good evening. Jaylen fryberg is not the kid anyone thought would snap. He was popular and on the surface the problems in his life were not the sort weve come to associate with mass school shootings. Still, the social media trail he leaves behind paints a teenager who may have been frustrated with some of those close to him. But even that may not fully explain why he apparently opened fire on his classmates in a marysville, Washington School cafeteria yesterday killing one and setting four others to hospitals with severe wounds before taking his own life. Today, authorities and eyewitnesses offered new details about the shooting at Marysville Pilchuck high school and what may have led to it. As we also learn more about the young victims, some of whom are fighting for their lives tonight. Nbcs joe fryer is in marysville, washington for us with more now. Reporter good evening, lester. Many students returned to school today retrieving items left behind when they fled. Tonight, the motive behind this shooting remains a mystery, but family members confirm two of the victims were related to the gunman. Witnesses say jaylen fryberg, the teenager who apparently opened fire inside the cafeteria at Marysville PilchuckHigh School Shot friends and relative who is are close to him. Alex hatch, a distant cousin and friend of the gunman was sitting the next table over. I looked up and jaylen, he was looking at us. He didnt look like him. He looked like a different person. He had a look on his face like he was just realizing what he did and, i think, he had a kind of change of his heart. If he wanted to, he could have gone on. Reporter receiving the first 911 call, at 10 41 a School Resource officer arrived in the cafeteria. By 10 43 it was confirmed fryberg was down after taking his own life. One victim, a female student, was killed. Four more were injured including two of the suspects distant cousins, 14yearold nate hatch whos in serious condition, and 15yearold Andrew Fryberg in Critical Condition. Theyre good boys. As well as the shooter, theyre just three complete buddies and they couldnt be closer than three brothers. Reporter the two other victims are gia soriano and sha ylee. A good girl. Always had a smile. Always said she loved you. Reporter both girls are in Critical Condition after they were shot in the head. The next three days are going to be crucial. These young people are being monitored moment by moment. Reporter students say fryberg was a popular positive freshman recently named homecoming royalty. This is the exact opposite of somebody we would expect to commit a terrible act like this. Reporter friends say a few days before the shooting, fryberg was more negative than usual. They say he recently got in a fight with another student. And Law Enforcement sources tell nbc news he may have been upset about a romantic relationship. Earlier this week on twitter fryberg wrote, it breaks me. It actually does. I know it seems like im sweating it off, but im not. And i never will be able to. But no one expected Something Like this to happen. Never known he would do this. If somebody would told me, i would say youre crazy. Reporter authorities have not yet released the name of the girl who died. As part of the investigation more than 100 student witnesses have been interviewed. Detectives did find a. 40 caliber handgun at the scene which they believe was used in the shooting. Lester. Joe fryer, thank you. In Northern California police are questioning a number of suspects after two Sheriff Deputies were shot dead and another injured. Alluding more than 100 Police Officers for six hours before his capture friday afternoon. His female companion was also taken into custody. Police have identified the slain deputies as danny oliver and Michael Davis jr. In a twist of fate davis died 26 years to the day after his father, a sheriff who also died in the line of duty. Tonight, three states across the u. S. Have now issued stronger ebola quarantines for some travelers from west africa. Late word that the u. S. Food and Drug Administration has issued an emergency authorization for two new tests that can detect ebola in humans. In new york city officials are trying to ease the publics concerns after a doctor who recently returned from treating ebola patients in africa tested positive for the virus. Nbcs ron allen has more. Reporter tonight, at a new jersey hospital nurse casey hicock spends another night in Isolation Unit despite another negative test for ebola. A frustrating ordeal while developing a fever. This is not a situation i would wish upon anyone she wrote. Adding she was scared and made to feel like a criminal. She says during some six hours at the airport no one seemed to be in charge. Shes the First Health Care worker returning to the u. S. From west africa to face a mandatory quarantine order Just Announced by the governors of new york, new jersey and illinois. Voluntary quarantine, no. Sounds like an oxymoron to me. You know, this is a very serious situation. Reporter a response to the case of dr. Craig spencer who arrived in new york from liberia and then became ill with ebola days later while monitoring himself. Doctors said he remains in stable condition. Meanwhile, spencers neighbor says shes staying put and is not concerned about ebola. For us from inside the building were very calm. Up and down my halls is very calm. Theres no running. Theres no ruckus. Reporter today trying to reassure the public, new yorks mayor revisited the diner where dr. Spencer dined before contracting ebola. It is narrowly defined related to individuals that have come into direct contact with ebola. Reporter the mayor also said he had not been consulted about the decision to impose the order. Ebola survivors like dr. Rick sayra have warned three weeks in quarantine will make volunteers less likely to help fight the disease overseas. For three weeks now youre going to have to take another three weeks totally out of commission. So its a real practical concern . Yeah. And most of these doctors are volunteers. Absolutely. All of them, i think. Reporter Health Officials in new jersey have said their patient, the nurse, will remain in isolation for 21 days. They say their preference is to quarantine people in their homes. Thats exactly whats happening to dr. Spencers fiancee here in new york, one of three people in quarantine because she came in close contact with him. Shes at home tonight, but the doctor remains here at the hospital still in stable condition. Lester. All right, ron. Thank you. And while this latest case of ebola is grabbing all the headlines, Health Care Professionals are worried about a much more common and deadly threat. The flu. Doctors say reality is flu can kill tens of thousands in the u. S. , not ebola. But there are ways to protect yourself. Nbcs john yang has our story tonight. Are you having any pain, sir . Reporter when demetrius walked in feeling ill, doctors quickly suspected a virus thats easily spread and is expected to kill thousands of americans in the coming months. Not ebola, the flu. Americans are far more likely to get the flu this year than they are to get ebola. And actually are far more likely to die from the flu this year than to die of ebola. Reporter like ebola seasonal flu can cause fever, headaches and sometimes vomiting and diarrhea. But unlike ebola, the flu is highly contagious and is commonly spread by coughing or sneezing. You cant get ebola through the air. In the akron area two people are quarantined and 39 others monitored because dallas nurse amber vinson, whos now free of the ebola virus, visited the area before falling ill. So far all have been symptom free. Whats the likelihood that youll see an ebola case here . So we think we are one of the most likely facilities in the country right now to get an ebola case, however the likelihood is extremely low. Reporter its a virtual certainty that theyll see flu cases this winter. Doctors say theres a simple step that could help, get a flu shot. Its very difficult to stop transmission unless we stop the initial infection in the first place. Reporter these children are doing something that fewer than half of all adults do, getting vaccinated against the flu. The government estimates that in an average year the flu claims about 25,000 lives, costs 10 billion in health care and another 7 billion in lost work. Last season there were 109 child flu deaths, about 90 of them hadnt been vaccinated. To make it more palatable, the vaccine can be delivered by a nasal mist. Its just like when you tip water up your nose when you go to a water park or something. Reporter a simple step that could potentially save lives. John yang, nbc news, akron, ohio. Turn to politics now and the crucial midterm elections just more than a week away. Right now democrats are in control of the senate, but there could be a major turning point come november 4th when voters cast their ballots. Tonight, several races are up in the air. Nbcs chuck todd has our report tonight. Hi, chuck. Lester, as you said, ten days ago until the midterm elections. Americans are freely expressing a lot of frustration with washington. But they seem confused about what to do about it. Out on the road voters consistently hit things that boil down to one idea. They feel ignored. Maybe congressmen that have been there for many years and they kind of forget about the people that voted to put them there in the first place. Reporter the political stakes are high. Will the democrats and harry reid retain control of the senate . Or will republicans and Mitch Mcconnell take over . Two years before voters go out to elect a new president. Senate races in at least nine states are too close to call right now including in places like iowa, kansas, colorado and georgia, races that are likely to be decided by singledigit margins. Cruising through americas heartland i heard an earful. The one constant . Anger at the president and Congressional Republicans alike. I didnt sit there and go to war for this country to turn around and come back and not have my family taken care of. Reporter kansans may determine who grabs the senate. We once again declare our independence, independence from both political parties. Reporter independent greg orman, positioned himself as a credible alternative to threeterm republican incumbent senator roberts. He told me he wants to send a clear message from kansas voters if he gets to washington. You cant go and hide behind your party label. You have to solve problems. Reporter while this has developed into an unpredictable election, its possible voters will revert to historical norm, punish the party in the white house and president obama. But i tell you, lester, as i learned this week, the political atmospheres a bit different. Dont be surprised if we see some strange results. All right, chuck. Thanks. Want to remind folks you can watch more of chucks meet the voters tomorrow on meet the press. The astrologer described as the most closely guarded secret, regularly began advising first Lady Nancy Reagan on her husbands schedule after the 1981 assassination attempt on the president. The consultations by phone were revealed seven years later by a former chief of staff. Kwigly is also remembered for claiming she convinced the first lady to press the president to soften his stance toward the soviet union after reading soviet leader gorbochovs horoscope. Gas prices are dropping fast. Good news, cnbcs Sharon Epperson tells us whats behind the fall. Gas prices are dropping fast and could be below 3 a gallon for the national average. Were already seeing drivers able to purchase gas below 3 a gallon at at least one station in every state except for hawaii, alaska and montana. This slide coincides with the slide that were seeing in oil prices. We have a price war going on between International Oil producers. We have robust supplies of oil here in the u. S. And slower demand for fuel here and around the globe. All of that is contributing to lower oil and gasoline prices. Americans are paying about 5 to 15 less to fill up their tanks than they did around the fourth of july, and that is great news going into the holiday season. But we could see some of that savings offset by higher food and other expenses. And so that may mean we may not see a significant boost to consumer spending. Lester. All right, Sharon Epperson. When nbc nightly news continues on this saturday, a rare look at u. S. Marshals continues on this saturday, a rare look at u. S. Marshals hunting down ah continues on this saturday, a rare look at u. S. Marshals hunting downcome on lets hide in the attic. No. In the basement. Why cant we just get in the running car . Are you crazy . Lets hide behind the chainsaws. Smart. Yeah. Ok. If youre in a horror movie, you make poor decisions. Its what you do. This was a good idea. Shhhh. Be quiet. Im being quiet. Youre breathing on me if you want to save fifteen percent or more on car insurance, you switch to geico. Its what you do. Head for the cemetery how can i ease this pain . man when i cant go, its like rocks piling up. 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But they are also the nations primary fugitive hunters as more than 100,000 wanted men and women who wind up in their sights every year learn the hard way. Hands up reporter you can run police u. S. Marshals reporter but you can barely hide. They dont solve crimes. Their job . Hunting down the most dangerous of wanted suspects. They should be considered armed and dangerous. It is somebody who knows theres a warrant out for them and are actively avoiding apprehension. Does this guy have any weapons history . Reporter the marshals comb databases, question friends and associates in what is often a cat and mouse game to the very end. Theyll have false compartments built into their dressers. Theyll have sections cut out of the flooring in their home. Weve found people hiding in the air vents. Reporter sometimes they give up quietly. I got left window. Reporter a bad day is what happened this past july in new york city when two marshals and a Police Officer were shot and wounded during a takedown. Is there anyone more dangerous than a desperate man . Not really. A lot of them its almost like a caged animal sometimes when you get them. This is the residence. Front doors on the right side. Reporter we recently spent 24 hours riding along with the Eastern Arkansas Fugitive Task force. Barely three hours in theyd caught their second fugitive, wanted on a weapons warrant. The Task Force Teams located across the country are made up of marshals and other federal agents along with state and local cops. At times the work is frustrating. Like always were going to have to develop something to send someone the right direction from here. Reporter that something comes an hour later. The marshals have received a lead that a fugitive sex offender may be nearby. Theyve pulled off here in this parking lot to brief their tactics before they hit it. Just before sunset they move in. They make an arrest. Its not their guy, but this one, too, has an outstanding warrant. The next morning make a smart decision reporter the team hopes for better luck as they close in on a suspect. He wont come out, so they breach the door. And finally he realized we wasnt going away and he decided to go ahead and surrender. Reporter hes the teams 999th fugitive arrest of the year. As far as the other names on the list, theyre on notice. Were not going to stop looking for you so you might as well go ahead and call it quits. Because were never going to give up. We do not quit. U. S. Marshals Fugitive Task forces arrest on average more than 300 fugitives per day. When we come back, Serena Williams used to crushing when change is in the air you see things in a whole new way. Its in this spirit that ing u. S. Is becoming a new kind of company. One that helps you think differently about whats ahead, and whats possible when you get things organized. Ing u. S. 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