captioning sponsored by cbs >> ninan: developing tonight, disturbing timeline. federal authorities uncover new details in that deadly shooting at a military base in florida. what the gunman reportedly did in the days leading up to that horrific attack. prisoner swap: an american student suspected of spying is free. what the white house says this means for escalating tensions between the u.s. and iran. on the move: a powerful storm slamming the west tonight. the dangerous conditions threatening millions right now. deadly outbreak: measles cases on the rise in samoa. we're on the ground in the island nation under a state of emergency. >> reporter: the outbreak here has killed 65 people, most of them children under the age of 4. >> ninan: and perfect record:

the 85-year-old teacher that just won't quit. >> i think the more positive you are, the healthier you are. >> this is the "cbs weekend news." >> ninan: good evening. i'm reena ninan. stunning new details tonight about the gunman who shot and killed three people at a florida military base. the gunman reportedly watched videos of mass shootings before the attack. david begnaud leads us off tonight from the naval air station pensacola. >> reporter: tonight, the associated press is reporting that the gunman, mohammed saeed alshamrani, held a dinner party earlier this week where he watched videos of mass shootings. and one of the people who was at that party, according to the associated press, recorded alshamrani during the shooting from outside the building as the shooting was taking place. tonight, the a.p. also reports 10 saudi students are being held here on the base and that others are unaccount the for.

when that news broke, we were interviewing sheriff david morgan of escambia county, whose deputies responded to the scene. i told the sheriff about the new reporting. this was his response: >> if that is true, and it's a danger to my community, okay, you will hear about that from this office, because that's my playground. >> reporter: in less than an hour, the f.b.i. jacksonville, which is leading the investigation, tweeted, "f.b.i. jacksonville is not aware of any credible threat toward the pensacola community at this time." it all started friday morning when alshamrani opened fire in a classroom on the base. within minutes, police stormed the building. six deputies fired at the shooter. two of the deposit were shot and wounded. >> so you had a little bit of a running gun battle going on in that naval training center. it involved going on more than one floor, and shots being exchanged and, you know, the suspect being hit but still being able to move and maneuver

in the building. >> reporter: joshua kaleb watson was among the victims who died his brother wrote on facebook that watts ofns shot multiple tiles but was able to tell deputies where the shooter was located. his brother said watson died a hero. according to the middle east media research institute, someone matching alshamrani's identity had an extensive online footprint. in a twitter post the writer says: we just learned that the u.s. military's northern command is telling all military bases to increase random security checks because of what happened here. the f.b.i. is not calling it terrorism, but they do have terrorism investigators on the scene. reena. >> ninan: david begnaud in pensacola, florida. a chinese american grad student imprisoned in iran for more than three years is free tonight. in a rare diplomatic breakthrough, the u.s. and iran exchanged prisoner prisoners in

switzerland. president trump boasted about the swap tweeting, "taken during the obama administration returning during the trump administration. >> reporter: smiling in switzerland xiyue wang is timely three, after more than three years locked up in this prison in tehran. in 2016, the priston graduate student was conducting research in iran when he was arrested and sentences to 10 years behind bars. >> the more knowledge the united states possesses ... >> reporter: his captors filmed him in captivity and accused him of spying in the u.s., a charge his wife denied in august when she sat down with cbs news' margaret brennan. >> my husband is an innocent man. >> reporter: today she said in a statement, "our family is fleet complete once again." also in switzerland today,let u.s. freed a scientist. the stem cell expert was accused of violating u.s. sanctions on iran, an allegation he denied. >> very emotional moments forig.

>> reporter: president trump described the release of the two men as a hostage swap and hinted it might lead to more cooperation. >> actually, i think it was a great thing for iran. i think it was great to show that we can do something. >> reporter: the trump administration is also insisting that iran release other americans, including sia mak and baquer namazi, michael white and robert levinson. now their families are hoping for a happy ending, too. roxana saberi, cbs news, london. >> ninan: robert levinson is the longest held imagine hostage in iran. his family is now calling on the u.s. to do more to secure his release. levinson's family said in a statement today they're disappointed the u.s. has been unable to bring him home. jeff pegues tonight. >> reporter: robert levinson, a former f.b.i. agent, vanished in 2007. the f.b.i. believes he was captured on iran's kish island while on a mission for the c.i.a. >> we have been fighting for 12

and a half years to get my father home to us. we know the iranian regime is responsible for kidnapping him. >> reporter: you have no doubt. >> we have no doubt whatsoever. >> reporter: this april 2011 photo of levinson in an orange jumpsuit still gives his family hope that eight years later, he is fighting and staying strong. last month, the iranian government admitted a united nations filing that levinson's case was ongoing. his family saw that as a ray of hope. >> it shows exactly what we've believed all along, which is that the iranians took him back in march of 2007, and that they have the ability to send him home to us. >> reporter: the reward for information leading to the 71-year-old's return has been increased to $25 million. sarah believes the reward and president trump's twitter messages demonstrate that the u.s. government is engaged on the issue. >> we want to know what charges they have against him, but most importantly, we want him home. he has seven kids.

he has a loving wife who is his soulmate, and he has nine grandchildren, eight of whom he hasn't met yet, so we want him home. >> reporter: in october, robert o'brien became the president's national security adviser. when he worked in the state department, he led diplomatic efforts on hostage-related matters and worked closely with the levinson family, further evidence, the levinson family hopes, that the white house is working to bring bob levinson home. jeff pegues, cbs news, washington. >> ninan: in washington, house democrats are in the final stages of preeng arms of impeachment. president trump once again dismissed the inquiry today on his way to florida where he'll speak at an event tonight. natalie brand is at the white house. >> the impeachment thing is a total hoax. the numbers have totally scwung our way. they don't want to see impeachment, especially in the swing states. >> reporter: as house democrats move forward with drafting articles of impeachment as soon as next week, the

president continues to defend the july phone call with ukraine's leader that triggered the impeachment carry. >> we had a perfect conversation. >> reporter: at the other end of pennsylvania avenue, house judiciary committee members are working through the week ahead of monday morning's hearings focused on the findings of the intelligence committee's reports. white house lawyers signaled they will not participate. in a sharply worded letter counsel said house democrats have wasted enough of america's time with this charade judiciary committee chairman jerry nadler fired back, "having declined the opportunity, the president cannot claim the process is unfair." >> i think president can shed light on a lot of this and if he thinks he has done nothing wrong, has nothing to hide, great, come forward and show us. >> reporter: judiciary democrats also released a 55-page report on saturday of the constitutional groindz for impeachment, saying in part, "impeachment is the constitution's final answer to a president who mistakes himself for a monarch."

nadler added, "the praimer's worst nightmare is what we are facing in this very moment." but there is debate among house democrats about whether to keep articles of impeachment limited to ukraine or whether to broaden to include elements from the mueller investigation. that's something they'll have to resolve quickly, if they're aiming for a possible vote by the end of the year. reena. >> ninan: natalie brand at the white house. well, tonight, 70 million americans are in the path of stormy weather that could bring torrential rain, wind, and snow. up to four inches of rain could flood the san francisco bay area, with winds gusting up to 40 miles per hour. and three to four feet of snow are forecast for the sierra nevadas, with whiteout conditions possible near reno. now to the deadly measles outbreak in samoa. the government there says nearly everyone that's eligible has now been vaccinated for the disease. at least 65 people have died since october, 57 of them children under the age of four. carter evans reports tonight

from apia. >> reporter: reena, doctors are still treating measles cases here at samoa's main hospital. they've even set up tents in the parking lot to deal with the influx of patients over the last couple of weeks. but doctors do tell me the number of new measles cases being reported is beginning to decline. the nation of samoa declaid a state of emergency back in november. schools are closed indefinitely, and children who are most vulnerable, are banned from gathering in groups. so far, almost 4500 measles cases vehicle reported, about 2% of the population here. the government says the outbreak killed 65 people in recent weeks, most of them children under the age of four. earlier this week, the island nation took the drastic step of shutting down government operations for two days while medical teams went door to door. residents were asked to hang a red flag in front of their homes if anyone inside still need a vaccine, which is now mandatory in samoa. the low vaccination rate here is fueled by fear in part.

back in 2018, two babies died after being immunized. officials later determined their vaccine was accidentally mixed with another medicine. yesterday, we met a mother of three who just lost three of her five children. her other two boys are now vaccinated and safe. reena. >> ninan: carter evans, thank you, carter. today marks the 78th anniversary of the attack on pearl harbor. ( "taps" ). >> ninan: many world war ii vets, along with hundreds of others, gathered to remember the japanese attack on pearl harbor. the surprise assault on the hawaiian base took more than 2400 lives and thrust the united states into world war ii. there's much more ahead on the ""cbs weekend news"." a warning tonight about the danger behind popular dating apps. plus why bmw is telling owners to stop driving their cars. and later, a remarkaeacher is on a role, 25 years and

counting.

>> ninan: a new investigation alleges sexual predators are using popular dating apps. the report exposed screening discrepancies between match groups, free dating apps including tinder, plenty of fish, and match.com. nikki battiste has one woman's horror story. >> reporter: janine dunphy says a free dating website connected her with a man she says raped her. >> i would not have never thought somebody like him would be on a dating website. >> reporter: dunphy is one of about 10 million americans a new investigation says is one click away from a sexual predator, hiding behind a profile on free dating apps and sites like tinder, okcupid, hinge, and plenty of fish. all of those apps are owned by

match group, which also runs the fee-based site match.com, which does scrub user profiles that are found on sex offender registries. match group has promised to screen against the sex offender registry list for specifically masm, but has not extended that to the rest of its apps. >> reporter: hillary flynn is with columbia journalism investigations. spokesperson told her a match group told her team there are definitely registered sex offenders on our free products. >> almost all of these attacks occur on the first date. >> reporter: dunphy says she met mark papamechail in 2014 on "plenty of fish" before it was owned by match group. she had no idea he was registered as a sex offender with prior rape convictions. dunfey said she felt comfortable and went to papamechail's house, where she says he raped her. >> right after it happened, i told a few of my very close friends. i think i was in shock. >> reporter: dunphy filed a police report, and papamechail was held for two years in county

jail. he was later acquitted. by 2017, papamechail was back on "plenty of fish," where he matched with a woman who also told police he raped her. a case against him was dropped after that woman died the next year. dunphy says these dating apps need to do more. >> a simple background check would have saved this whole thing from happening. >> reporter: in a statement, match group called the investigations inaccurate, telling us, "we do not tolerate sex offenders on our site and spend millions of dollars annually to prevent, monitor, and remove bad actors from our apps." nikki battiste, cbs news, new york. >> ninan: ahead, the multibillion-dollar deal for victims ravaged by wildfires in california.

massive settlement aimed at helping victims devastated by wildfires in california. the $13.5 billion agreement will assist in resolving claims associated with several fires in northern california. the money will go to victims who lost loved ones and/or property. the wildfires have been tied to pg&e's equipment. the spectacular victoria falls in southern africa have gone dry. what's called the worst drought in a century has slowed one of the world's largest waterfalls. this is what the falls should look like in the best of times. now there's concern that climate change could kill the region's biggest tourist attraction. and former new england patriots star rob gronkowski is talking about life after football. in our interview for "sunday morning," gronkowski explains why he walked away at the top of of his game. >> i just wasn't feeling like myself anymore. that's basically the main reason. the lifestyle all caught up to me.

and i was just fighting my way through the last two years. i mean, it wasn't enjoyable anymore, so i just knew that's when it's time to go and walk away. >> ninan: when you say you felt like you were fighting at it, what was the "it?" >> like, my body, my mind, mentally and physically, you know, just fighting every day to get through. >> ninan: you can see my interview with rob gronkowski tomorrow on "cbs sunday morning." ahead, the dangerous defect that has one car company warning its drivers not to get behind the wheel.

involving more than one million takata airbags. but there's a big difference this time. one car company is telling owners don't even get behind the wheel. kris van cleave tonight on the dangerous defect. >> reporter: if you have a 1999

bmw 323i or 328ii, the automaker is telling you do not drive it. in a crash, the takata airbag could explode, sending shrapnel into the cabin or simply not inflate at all. this new takata defect is in airbags produced between 1995 and 1999. it's been linked to at least one death and a handful of injuries worldwide. automakers, including toyota, honda, and audi, are now scambling to figure out which makes and models will need to be recalled, along with 1999-2001 3 series bmws, and 1998-2000 mitsubishi monteros. 1.4 million vehicles in all. jason levine from the center for auto safety. why did it take 20-plus years to find out there was a problem? >> it would appear that the reason they weren't discovered is because there weren't tragedies, which we can be thankful for. on the other hand, where was the quality control? >> reporter: a different but similar defect in takata airbags

has resulted in at least 24 deaths worldwide and forced the largest recall in auto history, approximately 41.6 million vehicles in the u.s. alone. roughly 13.3 million airbags still have to be replaced. >> spread the word about this potentially deadly safety recall. >> reporter: car makers enlisted hollywood star power to get owners to check if their vehicle was affected. in fort colins, colorado, thomas and martha fenno did just that, and they've been waiting three years for their 2007 tahoe to get fixed. >> we have a car that we can't use or get fixed, and... i'd like to punch somebody. >> reporter: general motors, who makes the yukon, has petitioned to exempt several of its vehicles from that massive recall, saying its own testing shows the vehicles are safe. now, in this most recent recall the 1.4 million we're just learning about,

it's unclear how many of them are still on the roads, given their age, and finding their current owners may not be easy. kris van cleave, cbs news, washington. >> ninan: ahead the teacher who is pretty much unstoppable.

>> ninan: finally toarnght a texas teacher on a mission for more than a quarter century. here's manuel bojorquez. >> reporter: 85-year-old sharon bradley is pretty much unstoppable. >> good job. >> reporter: she broke her hand in a fall on sunday and went to work the very next day. >> i wouldn't miss class for a broken bone! my goodness! >> reporter: bradley teaches health science at naaman forest high school outside dallas, and has not missed one single day in 26 years-- not when her house was damaged by a tornado or when her dear husband, jack, passed away. >> i'd done all i could for him, and so i really felt like i had a responsibility here to these kids. >> reporter: that sense of duty goes back to her days as a nurse. she was at parkland hospital the

day president kennedy was shot and brought into the emergency room. but her legacy is in the classroom. so, on her 85th birthday, the school surprised her with a party to celebrate her perfect attendance, and attitude. >> she's positive always, you know. and she gets it done. >> i think the more positive you are, the healthier you are, okay, the more fun you have in life. >> reporter: from september to june, she's in heaven. but come summer... >> oh, i mope. >> reporter: and she scoffs at the idea of retirement. >> boring! good. okay. i'd rather be in the classroom. isn. >> reporter: manuel bojorquez, cbs news. >> ninan: and we cooperate be arradleyteful for teachers like ank yol ve m well, soos the ""cbs weekend news"" for this saturday. later tonight on cbs, "48 hours." i'm reena ninan in new york. ank you for joining

live from the cbs bay area studios, this is kpix 5 news. now at 6:00, when it rained, it did poor or the bay area today. there is much more to come tonight, which is the last thing some folks need. >> parts of san francisco were flooded tonight after a heavy band of rain through the city. cars are spinning out and crews are working overtime to try to keep rias from toppling all the homes and power lines. he started shooting, he shot him like four or five times. and a police shooting in san francisco since a police suspect and officer to the hospital. ei am juliette goodrich. >> and i am brian heckman. we get right to the satellite map, which shows where it is all coming from, this low- pressure is now sending this

cold front to the south bay and some heavy downpours from time to time and it will be windy and stormy tonight. let's get you caught up. we still have showers behind and post frontal activities. you can see a line moving across central marin, over the east bay, scattered showers now and heavy rain. an hour ago, southbay is ready for action though. it is still coming down. rainfall over the past 24 hours shows an inch and a quarter in san francisco, now to southbay, those numbers will have to be updated. that is from about 40 minutes ago. still, in san jose, and plenty in marin where santa rosa almost 2 inches of rain. more to come tonight. in canfield, 2 inches of rain. wind speeds too,