police about his history of mental illness, including a stay at a psychiatric facility in july. 18 people died in last week's rampage at a bowling alley and a bar. more than a dozen others were wounded. >> the gunman was found dead friday after shooting himself allegedly. his body was discovered inside a box trailer belonging to a recycling facility where he worked before he was recently fired. now the attacker is just the latest mass shooter who has served in the military. >> investigator correspondent steven stock explains how researchers learn about mass shootings by tracking data, including how often they have a military background. >> this is a warning to the citizens of austin. stay away from the university area. >> reporter: from what's considered by many the first recorded mass shooting in, almost 60 years ago when 14 died at university of texas, austin, to more recent events, a dozen gunned down in a southern california bar, 12 shot in a virginia beach municipal building, and now lewiston, maine, a small pattern has emerged. >> people with a military background are overrepresented as mass shooters in our data. >> reporter: to be clear, we're talking about just a fraction of people with military backgrounds who become mass shooters, but that kind of nuance is what james densly tracks, that defines mass shooting as more than four people murdered in one event not including the offender, shootings in a public location, not part of an underlying crime. >> we have 14 or 15 mass shooters in our database that were marksmen or snipers in the military. >> reporter: a cbs news analysis of the data shows about a quarter of mass shooters have military service or training. that's disproportionately high. only 7% of the u.s. population, less than one in ten, has a military background. >> i think there's some skills that are learned in military which may lend themselves then to mass shootings that follow. so, for instance, proficiency with firearms. >> does it surprise me that people who have that skill and expertise are overrepresented? no, it does not. >> reporter: dr. barbara van dalen speaks from experience, a clinical psychologist who has worked with the u.s. department of defense for decades and has testified before a senate committee. why are we seeing these numbers so skewed? >> it's complex. this is a very complicated set of factors, issues, conditions and when it comes to mass shootings, there are certain people in our society who have more knowledge, more expertise. >> reporter: army officials say leaders called the new york state police during a training exercise in july concerned about robert card's mental state. troopers took him to a hospital for evaluation. in case after case, shooters have had known mental health issues. the justice department settled a 2017 lawsuit by sutherland springs, texas victims claiming the air force was negligent when it didn't add information about that shooter to a national background check database. that would have prevented him from purchasing a gun from a licensed dealer. the justice department did not admit liability. >> the more information we can have earlier, the more information we can have to understand how people get to the point where they start to feel these kinds of impulses, their hopelessness, just giving up and what can help change that course so that it doesn't lead to something like this. >> reporter: what does lead someone to do this? research by the violence project has identified common traits, childhood trauma, later in life a personal crisis leading to radicalization, and access to guns. while the gunman in lewiston's life is still under investigation, his access to guns and military background is already the focus of intense scrutiny. >> again, it bears saying that the vast majority of people who serve in the military go on to lead incredibly successful lives and obviously we're incredibly grateful for that service. so this is not a case joining the military turns you into a mass shooter. >> just about three hours ago we learned about another potential mass shooting that was averted. authorities in denver say a heavily armed man killed himself rather than carried out his apparent plan to attack an amusement park. today jury selection began in the trial of a woman accused of murdering a bay area cyclist. katelyn armstrong is accused of killing anna moriah wilson known as mo in may last year. wilson was found shot to death in austin, texas, while preparing for a race. police say armstrong was in a relationship with the man who wilson had also been briefly connected to. the yoga instructor was arrested in costa rica after 43 days on the run and was recently accused of trying to escape from custody. google's ceo took the stand today defending his company in a landmark antitrust trial testifying his company has always been on the side of consumers. he took a couple swipes at microsoft's internet explorer. the justice department claimed google spent billions to operate an illegal monopoly to make sure its search engine was the default selection on cell phones and desktop browsers. the google chief was the highest profile witness to testify so far in this ten-week trial. president biden signed a new executive order aimed at protecting americans from the risks of artificial intelligence. it requires some ai developers to perform safety tests on their systems and share those results with the feds before they are deployed. it also creates an advance cybersecurity program to detect vulnerabilities in software systems and a national security memo on the use of ai by our own military and by our adversaries. >> i'm directing the department of defense and department of homeland security, both of them, to develop game changing cyberprotections that will make our computers and our critical infrastructure more secure than it is today. >> the order also urges congress to pass data privacy legislation to protect all americans, especially children. about 1,100 workers in the california state university system say they are ready to walk off the job. their union voted to authorize a strike if they can't reach a deal on a new contract. the union represents facilities workers, mechanics, electricians and others at 22 campuses. the united auto workers strike appears to be coming to an end nearly seven weeks after it began. general motors and the uaw reached a tentative agreement on a new contract. that deal reportedly contains a record setting 25% wage increase with cost of living increases. gm is the last of the detroit automakers to settle. all three agreements must be ratified by the rank and file. millions of americans have been diagnosed with the disorder that causes hoarding. up next, how some of them are using virtual reality to practice letting go in hopes it will translate to the real world. >> it represents a stepping stone to be able to practice letting go of items in this curated personalized 3d space. a bay area party store was struggling for business ahead of halloween until the owner's daughter got involved, a viral tiktok that completely changed their fortunes. when we challenged ourselves to create the world's most emotional and sustainable vehicle, we had tothink differently. we had to push the boundaries to not just create a car but a movement. every fisker ocean is produced with over 50 kilograms of ethically sourced, recycled materials. it's about accomplishing something bigger than itself. a clean future for all. sanford university investigating a ransomware attack. the mercury is reporting a ransomware group now threatening to release confidential information from the university onto the group web. that group claims to have private documents and information from stanford's department of public safety. stanford claims the impact to systems have been secured but did not address the data already allegedly stolen by those hackers. also at stanford researchers are trying to help people declutter by using virtual reality to conduct behavioral therapy. the people they're working with have a hoarding disorder which goes way past common disorganization. they exhibit obsessive attachment to items often including garbage and extreme distress and difficulty letting go, to the point that their homes are literally overtaken and their lives crippled. >> virtual reality offers the opportunity for those individuals where we can't practice in their homes are the because they have too much clutter and it's difficult for us to go inside or they have mobility issues and it represents a stepping stone to be able to practice letting go of items in this curated and personalized 3d space. >> dr. rodriguez tells me more research is needed on hoarding disorder. it only became a distinct psychiatric diagnosis in 2013. hey, straight ahead, we all want to crack the code and point the finger at the 49ers problem, but we'll hear more from bounced from one doctor to the next. did they even send my lab work...? wait, was i supposed to bring that? then there's the forms. the bills. the 'not a bills.' the.... ”press 4 to repeat these options.” [chaotic music] [inspirational music] healthcare can get a whole lot easier when your medical records, care and coverage are in one place. at kaiser permanente, all of us work together for all that is you. let's check in with weather now. a lot of people are wondering do i have to cover up my costumes, wear extra layers, long johns? >> these are very important questions we need to have answered now because we got to prepare. >> things are looking good for the trick-or-treat forecast. it will cool off through the evening, so costumes that are more sparse in terms of fabric, you may want to bring an extra layer or two. it is looking good overall for halloween, above average temperatures in the afternoon and cooling down through trick-or-treat time tomorrow evening. the warmest day of the week is wednesday and we start to cool off with more cloud cover late this week and rain chances reenter the forecast as we head into the weekend, which is something we could definitely use after a dry and windy weekend. the winds have died down. the humidity levels are still a concern, especially in the afternoons the next couple days. you can see futurecast painting relative humidity levels in the north bay and east bay hills in the 10 to 15% range without the gusty offshore winds we had over the weekend. eventually we need to add a little moisture to help mitigate the fire threat further again wednesday in the 10 to 15% range for the lowest humidity levels with our warmest temperatures thursday. we'll have to wait several more days for the rain chances to arrive. it's a decent chance saturday night into sunday and again early next week. the long range forecast data is still a little all over the place in terms of exactly where the rain chances will shape up, how much we might expect, but it's looking more or less favorable. we'll focus on the details through the rest of the week into the weekend. the rain chance will be accompanied by a cooldown. after we peak our temperatures wednesday, you can see the ten-day outlook for livermore coasting back to near average highs over the weekend and slightly below average through the first full week of november. looking outside now in the second to last evening of october, nice view of san jose, temperatures mostly low to mid-70s, upper 60s in oakland as the cool spot. later tonight it should be pleasantly cool but fairly close to normal for this time of year with lows in most locations dropping to the 40s and we warm up to 3 to 8 degrees above average. right around 80 degrees in san jose, a little toasty in the santa clara valley, 80 degrees in los gatos, very close in morgan hill, inland in the east bay mid- to upper 70s. it's going to be warmer in fremont than concord and antioch, not usually the state of affairs, temperatures tomorrow generally on an even playing field except along the coast where you'll be in the upper 60s. right around 80 degrees inland in the north bay, just below 80 degrees in novato, around 80 degrees for petaluma and napa and just short of 80 degrees in santa rosa. temperatures will continue to drop off after the warmest day wednesday, but not at a fast rate. we'll see inland temperatures bottoming out in the upper 60s monday next week and a decent chance of rain showers, some moisture accumulating in our seven-day tubes the second half of the weekend, but the specifics of the rain is still very much in the air. be flexible with outdoor plans. we'll keep you updated. along the coast your temperatures will be a little cooler. everybody is pretty close to each other as we finish october. even your coolest days top out in the low 60s sunday and monday to go along with the chance of showers sun. >> thanks, paul. time for a check of what's ahead at 6:00. >> coming up at 6:00, a bay area elementary school warning parents after a child got sick from eating cannabis-infused candy, what we're learning about how it happened and now all the kids have to throw out their candy. plus a closer look at the firestorm that's followed after the city of richmond passed a resolution some call anti-israel, the strong reaction, even threats of violence. also new developments in the wild chase across the bay that had a suspect throwing explosives, what neighbors heard and what we're learning about the suspect's past conviction involving a bomb, a lot to cover in about ten minutes. let's go to vern and some sports, the 9ers. >> yes, we do have the 49ers up top. that team is in shop for more repairs during a bye week. 5-0 to 5-3, the 9ers are an open target and legions of 49er empire judging from social media have become general managers who have an answer why you could make a game out of it. our first contestant, george kittle. >> is there a common element why you're not scoring more points? >> turnovers. >> show me turnovers. the 49ers have had back-to-back games with three turnovers. why else are they losing right now? our next contestant is the head coach, kyle shanahan. >> there's not one thing i'm going to pinpoint. i think we need to run the ball better, score more points. >> two good answers, yeah, from the coach. san francisco has scored 17 points in three straight weeks, all losses, but we're not done. let's go to our third contestant, fred warner. >> i haven't been able to say in the last three losses that man, the defense had our best outing. we just happened to lose. we're not playing good football on our side and that's the reason why we haven't won the last three games. >> well, the defense has allowed over 400 yards in back-to-back weeks, but if the fans had to guess, they put the blame on brock purdy. i'll do my best steve harvey impression. show me brock purdy. purdy's teammates, yeah, they say he's not to blame for the losing streak and they have full confidence in him, even as the turnovers are starting to mount, three more yesterday and now six in the last three games. george kittle has the solution for purdy to get back on track. >> the only thing i'd ask brock to do is hey, man, try not to throw interceptions. i don't know. turnovers are hard. i'm not going to put myself in his shoes and say i wouldn't have made that throw. i don't know what it takes to play quarterback. i don't play that position. >> from family feud to the newlywed game, jeff and carrie tied the knot in levi's stadium parking lot before sunday's game, a tailgate wedding. here's the twist. jeff is a 49er fan. carrie is a bengals fan. >> it went from an easy tailgate to stress. >> there's nothing on pinterest, just so you know, for a tailgate wedding. we had to be creative. >> reporter: do you think the game will be a little stressful to get off to a marriage? >> yes. but we're solid. >> it's like any marriage. somebody will be completely miserable for three hours and hopefully it's her. >> i must ask, ryan, liz, would you guys consider a stadium venue way back when? >> no. and i say that with tremendous love and affection for this couple and for anybody who wants to get married at a sporting event stadium, field, whatever. i actually think it's really cute. it's not my vibe. >> i went to the old oakland coliseum, but my wife would talk to liz and then she would go nah. >> but we can go to the game after the ceremony weeks later and pretend -- >> for a honeymoon? >> no. as a date. that works. >> ryan, as we always say, happy wife, happy life. >> words to live by. still ahead here at 5:00, a party store on the peninsula was looking pretty dead in the leadup to halloween until a viral video brought things back to life. >> it when we challenged ourselves to create the world's most emotional and sustainable vehicle, we had tothink differently. we had to push the boundaries to not just create a car but a movement. every fisker ocean is produced with over 50 kilograms of ethically sourced, recycled materials. it's about accomplishing something bigger than itself. a clean future for all. hundreds of people turned out at ocean beach yesterday for the great haunt wave. this video was taken by supervisor joel engardio. trick-or-treaters are out and about more than a little bit early. with halloween about 24 hours away, you might think a local party and costume shop would be doing a booming trade. >> betty yu shows us it was quite the opposite for one party store owner on the peninsula until a mention on tiktok brought his store back from the dead. >> reporter: this halloween barbie is one of the most popular costumes. still a bay area party store was struggling to move costumes off the shelves. that's until the owner's daughter made a tiktok that went viral. halloween sales this october were looking downright scary for diddams party and toy store, which has three locations on the peninsula. steve diddams has run them for 34 years. >> we were scared to death. we had to buy this stuff a year in advance and so you buy it and then you got to sell it all in like a week and a half. >> reporter: steve started to worry. >> hi. if you are from anywhere near the bay area, california, please stop scrolling. this is my dad. he's a really good man and i've watched him work my whole life tirelessly for me and my mom and three brothers to provide for us. >> reporter: his daughter in new york made this tiktok to try and help without telling him. >> literally any need for halloween, give my dad a fighting chance against jeff bezos and visit diddams party and toy. i know our family would so, so appreciate it. >> reporter: it quickly received more than 300,000 views and thousands of comments. how did you feel watching the video? >> i couldn't believe it. i thought i couldn't have asked for a nicer video. she was just beyond sweet. >> reporter: and he couldn't believe how many customers poured into his stores to show their support. >> this is barbie. >> reporter: we met this mother and daughter from los altos shopping for halloween costume accessories at the mountain view store. >> it was so sincere and heartfelt and we were like okay, we have to go here. it was like okay, it's last minute. we have to go do halloween shopping and we were thinking what to do. we see the video and i'm like there's no two ways. we are going to the store. >> reporter: he said similar party stores across the country are seeing a 20% drop in sales this halloween due to the economy and/or online big box retailers. >> all my friends are negative 20 and i'm even. so that is just a giant gift. >> reporter: sales are nowhere near prepandemic levels, but steve is grateful. customers who mentioned the tiktok are given a 50% discount. >> as i see people one by one, i'm not sure that my efforts are appreciated and just to see this giant -- i mean thousands of them saying oh, my favorite store when i was a child. it was beyond nice. >> love our loc
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