on this saturday night, final moments. new details tonight on what happened right before a high school freshman opened fire. fighting ebola. three states put stricter quarantines in place for certain travelers from west africa. plus, what american doctors say the real threat is. falling gasprices. three words you rarely hear. why is it happening now? and, it's a dog's life everyday at one american office where four-legged friends are welcome as long as they follow the rules. from nbc news world headquarters in new york, this is "nbc nightly news" with

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 we've 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. nbc's 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 pilchuck high 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 didn't 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 suspect's distant cousins, 14-year-old nate hatch who's in serious condition, and

15-year-old andrew fryberg in critical condition. >> they're good boys. as well as the shooter, they're just three complete buddies and they couldn't 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 i'm sweating it off, but i'm 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 you're 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 public's concerns after a doctor who recently returned from treating ebola patients in africa tested positive for the virus. nbc's 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. she's 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, spencer's neighbor says she's staying put and is not concerned about ebola. >> for us from inside the building we're very calm. up and down my halls is very calm. there's no running. there's no ruckus. >> reporter: today trying to reassure the public, new york's 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 you're going to have to take another three weeks totally out of commission. >> so it's 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. that's exactly what's happening to dr. spencer's fiancee here in new york, one of three people in quarantine because she came in close contact with him. she's 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. nbc's john yang has our story tonight. >> are you having any pain, sir? >> reporter: when demetrius walked in feeling ill, doctors quickly suspected a virus that's 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 can't get ebola through the air. in the akron area two people are quarantined and 39 others

monitored because dallas nurse amber vinson, who's now free of the ebola virus, visited the area before falling ill. so far all have been symptom free. what's the likelihood that you'll 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: it's a virtual certainty that they'll see flu cases this winter. doctors say there's a simple step that could help, get a flu shot. >> it's 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

hadn't been vaccinated. to make it more palatable, the vaccine can be delivered by a nasal mist. >> it's 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. nbc's 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 single-digit margins. cruising through america's heartland i heard an earful. the one constant? anger at the president and congressional republicans alike. >> i didn't 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

three-term republican incumbent senator roberts. he told me he wants to send a clear message from kansas voters if he gets to washington. >> you can't go and hide behind your party label. you have to solve problems. >> reporter: while this has developed into an unpredictable election, it's 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 atmosphere's a bit different. don't be surprised if we see some strange results. >> all right, chuck. thanks. want to remind folks you can watch more of chuck's 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 husband's 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 gorbochov's horoscope. gas prices are dropping fast. good news, cnbc's sharon epperson tells us what's behind the fall. >> gas prices are dropping fast and could be below $3 a gallon for the national average. we're 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 we're 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! let's hide in the attic. no. in the basement. why can't we just get in the running car? are you crazy? let's hide behind the chainsaws. smart. yeah. ok. if you're in a horror movie, you make poor decisions. it's what you do. this was a good idea. shhhh. be quiet. i'm being quiet. you're breathing on me! if you want to save fifteen percent or more on car insurance, you switch to geico. it's what you do. head for the cemetery!

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tonight, we take you on the hunt with some of the crime fighters behind the long arm of the law. the u.s. marshals service is still a bit of a mystery to a lot of folks. they do cover a lot of ground, handling everything from federal court security and prisoner transport to secret witness protection. but they are also the nation's 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 don't solve crimes. their job? hunting down the most dangerous of wanted suspects. >> they should be considered armed and dangerous. >> it is somebody who knows there's 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. >> they'll have false compartments built into their dressers. they'll have sections cut out of the flooring in their home. we've 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 it's almost like a caged animal sometimes when you get them. >> this is the residence. front door's on the right side. >> reporter: we recently spent 24 hours riding along with the eastern arkansas fugitive task force. barely three hours in they'd 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 we're 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. they've 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. it's 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 won't come out, so they breach the door. and finally -- >> he realized we wasn't going away and he decided to go ahead and surrender. >> reporter: he's the team's 999th fugitive arrest of the year. as far as the other names on the list, they're on notice. >> we're not going to stop looking for you so you might as well go ahead and call it quits. because we're 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. it's in this spirit that ing u.s. is becoming a new kind of company.

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at 6'5" and 255 pounds, dwaine "the rock" johnson is used to being the biggest guy in the room, playing characters like hercules. he tweeted 7'9" chinese basketball player, sun ming ming, the rock perhaps for the first time looks like a pebble in comparison. when we come back, if you bring your dog to work, just man when i got shinglesif you it was something awful. it was like being blindsided by some linebacker. you don't see it coming. boom! if you've had chicken pox, that shingles virus is already inside of you. it ain't pretty when it comes out. now i'm not telling you this so that you'll feel sorry for me. i'm just here to tell you that one out of three people are gonna end up getting shingles. i was one of 'em. so please go talk to your doctor or pharmacist.

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department. so what happens when hr gets on their tail? nbc's harry smith has tonight's story. >> reporter: if you love dogs, this story might make you more than a little jealous. because at this outdoor clothing company in vermont, bringing your dog to work has been part of the culture for more than a decade. for the people who work here and their dogs, this is just another day at the office. isn't he a distraction? >> you know, he can be, yes. but -- [ laughter ] >> reporter: i think some people worry that the dogs would be a distraction and that the employees would spend too much time, you know, just like petting the dogs or down on the floor with the dogs. and, i guess i could see how that could happen. and that was the concern of ceo

ted manning when he joined last year. >> while dogs may not be the most productive decision here, something bigger happens here. >> reporter: for some, getting to bring your best friend to the office is the ultimate perk. >> everybody really sees it as a benefit just like a 401(k) or health insurance or any kind of premium like that. >> reporter: but there are rules. and a committee of dog owners and non-dog owners to enforce them. barking, biting and popping can result in an invitation to stay home. that happened to archer. >> he got kicked out. yeah. he was picking fights with some of the other dogs. >> reporter: no? >> yep. >> reporter: you? but after some extra training, archer was let out of the doghouse and back into the office. >> and now he's just this little love boat. >> reporter: yes, every dog has its day. every day. harry smith, nbc news, white river junction, vermont. >> don't you love it?

that's "nbc nightly news" for this saturday. i'm lester holt reporting from new york. i'll see you tomorrow morning on "today" and right back here tomorrow evening. good night everyone. ♪ ♪ let's get it on ♪ we ready for them let's get it on ♪

♪ we ready for them let's get it on ♪ >> "the blitz" is back with some great game-breaking plays. some truly heartwarming moments. all the sights and sounds of high school football in our area. welcome to "the high school blitz." it's that time of the season when teams are really jockeying for playoff position. we have some critical division matchups in this week's show and we begin with a pair of top 20 ranked teams in the catholic league. st. joe's prep is the top-ranked team in our area, taking the field against roman catholic. the prep's deandre swift, he is swift, didn't need many moves to get there, easy touchdown. prep's defense is dominant, michael bright turns out the lights on the run. oh, yes. prep quarterback jackson, going to keep it himself, he gets around the outside completely untouched.