the liquor store as well. i talked with the employee inside who was there when it happened last night around 7:00. he says the teen is a regular customer. that he had bought candy. and it was when he went outside that two boys were waiting for him. police have not offered any details about who they arrested. 14-year-old rashawn williams was with his younger brother, leaving ruben's market in the mission district when someone stabbed him. family members say the younger brother ran for their mother, who took rashawn to the hospital. he did not survive. >> i'm tore up. i'm broken up right now. >> reporter: rashawn's uncle says he was like a son to him. he shared these pictures with us, so proud of the young man with a 4.0 grade point average. he was also about to play his first season on the football team at sacred heart. >> he was part of our family. everyone knew him and knew of him. as a family member kind of us to. we bring everyone in. that's kind of the way we do with our football program.

it was really sad to hear what happened. >> reporter: his cousin describes the moment he found out what happened. >> it was hard. i felt a pain that i can't explain through my body when he dad called me. >> reporter: jamar says rashawn was his favorite little cousin, and everyone we talked with says he was smart, funny, and had a very bright future. >> he was a good kid. i didn't see him having no problems with anybody. >> reporter: police have not revealed a possible motive in the killing, but rashawn's uncle and others say there was a boy who had been threatening him on social media. in san francisco, abc 7 news. and the school tweeted out this message today. today we mourn the tragic loss of one of our brothers and friends, a member of the class of 2018. may christ's love and peace be with his family. pittsburgh police have arrested a second person involved in the hit-and-run death of a woman walking her dog sunday night. police arrested 29-year-old jorge perez last night and arrested his 24-year-old brother raoul munoz hours ago.

surveillance video shows a truck jumping the curb on willow pass road before hitting and killing 50-year-old michelle braz. investigators aren't sure if alcohol was involved since the incident happened days before the suspect's arrest. >> i felt more at ease because this person is off the streets and it will be less likely for him to harm anyone else. >> reporter: people are still gathering at a memorial for braz to pay their condolences. officers recovered the vehicle in the bakersfield area. a bay area man who has been running an unregulated massage business for 30 years has been arrested for sexual battery. he is 66 years old. he told police in east pal o alo that he helps people out of his home. police are looking for possible victims. they are asked to contact the east palo alto police

department. a woman tired of all the illegal parkers near her business decided to jump into action when she saw another parking law breaker today. she really had no idea what she was getting into. tiffany wilson is joining us live with the story of an unsuspecting crime sleuth. hi, tiffany. >> reporter: well, it all started off with patty, who was fed up and frustrated with people parking in red zones like this right in front of her store. so this morning when a minivan pulled into that space, she didn't hesitate to pull out her phone and start taking pictures. >> you can see they were in the red zone. >> yes. >> reporter: call her the red zone watch dog. when she saw a van pull into the space in front of her store this morning, she whipped out her camera. >> the license plate wasn't a license plate. it was just like a white paper, and it said "wow" in blue writing. >> reporter: it wasn't just a couple of guys running in to grab coffee either. about a minute later, two men wearing hoodies and gloves burst

out of david's jewelry store. >> they rushed into the minivan. i was just taking pictures contrstacont constantly. >> reporter: one picture captures the driver behind the wheel, the van pulling away, and paper covering the back license plate. here you thought you were going to catch somebody for parking in the red zone. >> yes. i thought that's what i was doing. but now, it was a robbery happening. spooky. >> reporter: police called in backup and a helicopter. nearby schools went on lock down. >> there was at least one handgun. of the two suspects, only one showed. we don't know if there was another handgun involved. >> it seemed like they just came in and rushed out of the minivan and ran into david's and ran back out. it was quick. >> reporter: this van was later recovered, but the robbers are still on the loose. >> i was trying to remember another time in recent history where we've had a takeover robbery of a store.

>> reporter: although two store employees were scared and badly shaken, no one was injured. david's jewelry plans to reopen tomorrow. >> i'm thankful that i had the phone next to me, and i'm very thankful that everyone just responded really quick. i feel maybe i was there for a reason. >> reporter: with patty's pictures, police are confident they can solve this crime. in st. helena, tiffany wilson, abc 7 news. there was another aftershock from the napa earthquake 10 days ago. this was a magnitude 2.7. it hit overnight at 3:18 in the morning. meanwhile, there is more evidence of the power behind the 6.0 quake on the 24th. as you can see, the double yellow lines on highway 12 near cutting spore road shifted more than a foot. look at that. of course, so did the earth beneath them. that's why this happened. pg&e crews in napa are working to excavate a massive gas line. it passes right through the epicenter of the napa earthquake. crews began to work last week when they realized it was on a fault.

classes at stonebridge school just began again yesterday. school officials say they were concerned about the safety of students. >> we're not taking this lightly by any means. we really are just staying real close communication with pg&e. and just talking about what the future looks like, if it makes sense to replace a line here, are there other alternatives to be pursuing. we are just open to that >> keep in mind there's no gas in the 26-inch main right now. pg&e says they found no leaks, but wanted to dig the pipe up as a precaution. if they find an area that is weak or warped, they will replace it. a bus driver is recovering tonight after she was assaulted by a passenger. police took this man, who has not been identified, into custody this afternoon. according to officials, the man threw rocks through an open window on the bus which hit the driver in the head. happened on the 38 l line near 17th avenue and gariy boulevard.

>> i saw something that you would pretty much see in the olden days. it's very sad what i just saw. a man came up and assaulted a government official, which is the bus driver. and i'm really shocked that this stuff still exists to this day. >> the driver was treated at the scene. the paramedics rinsed her eyes and then she was taken to the hospital to recover. san francisco police had to keep a close eye on a union pacific railroad crossing after a vehicle snapped the crossing arm off around noon today. a witness tells abc 7 news that a city-owned vehicle was traveling along gerald avenue and then sped up to beat oncoming train. the truck got through, but hit the crossing arm that was coming down to block the traffic. >> the train stopped halfway, and then the engineer got out and removed the thing from the middle of the track. threw it to the side. got back on the train and moved the train. and i think the people here from the central shops called the police. >> the truck apparently stopped for a few seconds and then took

off. police are still looking for the vehicle and the driver. officers blocked traffic along gerald for several hours until the crossing arm could be ficked. animal control is warning people to keep their cats and small dogs inside at night because of a sharp increase of the number of coyote sightings in the area possibly because of the drought. the wild canines are coming to urban areas to hunt for food. evidence of paw prints were found on the back deck of one pal troy polamapa palo alto home. >> about one a day, one cat a day. as the food sources are becoming less plentiful in the hills, they are coming down to find food. >> coyotes are nocturnal. keeping pets inside at night should keep them safe. well, the $5 billion decision.

tesla picks a site for its battery factory. which state is getting 6,000 new jobs. if you've noticed more branches falling in your neighborhood, you're not alone. >> i heard a bunch of cracking. it was a huge noise, and it scared me to death. >> still ahead, why much of the bay area is living in limb-o. and michael finny on how to unlock hidden discounts at your favorite stores. ab

the mandatory evacuation order is being expanded around that massive wildfire burning in the national forest. people living in about 250 homes around the community of hamburg are ordered out.

about 750 houses are threatened. the move comes after the fire grew by about eight square miles overnight and burned through about 112 square miles as of this morning. the weather conditions are not helping firefighters. forecasters are calling for another day of gusty winds that could push the fire over containment lines and into threatened communities. tesla motors has chosen nevada to house its $5 billion factory. several states competed for the electric car maker's new battery plant, which could generate 6,500 jobs. the ceo says the winner would shoulder 10% of the factory's total costs, which means $5 million in economic incentives. senator dianne feinstein spoke with musk this morning and seemed a little surprised, frankly, by the decision when we caught up with her this afternoon. >> i'll have to find out exactly what happened, because i spoke to the governor about it and i know he put a special effort into it. and i thought they had some good proposals to make. >> california's legislature

adjourned last weekend without acting on a bill that could have delivered that kind of package. lawmakers said no legislative action would be taken before reaching an agreement with tesla. an official announcement is expected tomorrow. pg&e is laying the groundwork to appeal a $1.4 billion fine in connection with a pipeline explosion. the utility filed paper work today indicating plans to file an appeal within 30 days. a pg&e spokesman says it wants regulators to take into consideration the nearly $3 billion pg&e has spent or will spend on pipeline safety improvements. regulatory officials issued the fine yesterday, accusing pg&e of 3,800 violations over several years. you know, it's something we expect to happen in winter, especially during a storm. but arborists say the phenomenon of treeing dropping their limbs is more prevalent in the summer. and we've seen a couple of really tricky and dangerous examples just this week in the east bay. laura anthony is live in concord

tonight. laura, is this drought related? >> reporter: well, dan, that's one thing the experts don't know at this point. it's an issue that hasn't really been studied all that much, but it is happening all over the east bay this summer. especially after a heat wave. now this is a case here in concord. the opener tells me this tree, a limb from the tree, is from a tree that's hundreds of years old. and it's unclear why it would fall now. >> i heard a bunch of cracking. and i couldn't figure out what it was. >> reporter: concord's liz taylor says she thought it was another earthquake. that noise her giant oak made when it dropped a huge limb squarely in the middle of her backyard. >> a friend came to look at it. and i said, a branch has fallen off the tree. and he says, oh, no, that does not describe the situation. this is bigger than most trees. >> reporter: this expensive barbecue also took a direct hit this week at a home in walnut creek. the culprit, also an oak limb.

>> it's called summer limb drop. that's what it's called in the book. it's been argued. >> reporter: he is an arborist with a tree service in walnut creek. he says it's not clear if the phenomenon is drought related, but it seems to happen a lot especially when hot weather suddenly turns cool. >> we tend to see it when it's high 90s, over 100 for sure, and we get a sudden drop in temperature like in the afternoon or evening. if it drops like 20 degrees. our phone will ring off the hook. >> reporter: best advice for homeowners. if they suspect their tree might be a candidate for sudden limb drop, have it checked out by a professional. in concord, laura anthony, abc 7 news. >> that's unnerving. >> it is. from shopping like an insider to a deal on data plans, there's quite a bit of consumer news. >> michael finny is here with all of the details tonight. >> there is a price war.

and that's good. going on in the mobile phone space. and some consumers are finding themselves in the sweet spot to get a sweet deal. sprint is cutting the costs for the prepaid service and doubling the data available in an effort to keep customers from switching over to t-mobile. new and existing boot mobile customers can get prepaid plans with unlimited calling and texting as well as one gigabyte as data for just $35 a month. there is a big change occurring at cvs stores. the chain pharmacy has stopped selling tobacco products in all of its stores today. that is nearly a month sooner than planned. health advocates applaud the move and hope it will be followed by other drug stores. now the chain has 7700 retail locations and is the second largest drug store chain behind walgreens. the american pharmacists association called on drug stores to stop selling tobacco back in 2010. now several independent stores

have done that, but cvs is the first large chain to stop tobacco sales. today "good morning america" went shopping with hidden camera shopping guru with a hidden camera kyle james of rather be shopping.com. he showed gma how to spot savings on supplies tags. some retailers use it for inhouse sales. at home depot, prices ending in "06" means six weeks until the next markdown. and that will be the chain's best deal. chains turn to the store employee for confirmation of a secret code cracking. >> this is insider stuff. you're not supposed to know that. >> rather be shopping lists about a dozen stores' pricing plans. we have a link on our website. one of them is costco. we told you about that one before. >> yeah. very worthwhile. the 49ers offered a unique

tour of their new stadium in santa clara today, not to show off the field or trophies but show off its technology. a 49 nerd was on hand to explain the app which you can use for mobile ticketing and to order from the concession stands. the facility has four times more internet capacity than the nfl's new standards will require next year. and they have learned a lot about what fans want during the preseason. >> of course, we tested at candlestick on a small scale, six users at a time. when you have 10,000, 20,000 folks at a time, it changes our processes. so i think every game we'll just improve. >> we have heard some complaints about the lack of wi-fi strength in the parking lot. but the big cell phone companies have put up repeaters to help you connect outside. >> 400 miles of cable? >> that is a lot. let's talk about the weather forecast. nice outside today. >> it is.

and our meteorologist has our latest on the forecast. it's nice to see the sun again. >> it is. yesterday alma and i were talking, and she said are we going see the sun out here? yeah. it's brighter today, just for you. all right. it's an uplifting weather forecast for today. certainly was a little bit warmer with clearing earlier today, and a weaker sea breeze. let me show you live doppler 7 hd and we'll talk about what's coming for the rest of the week. as you look at live doppler 7 hd, the fog is starting to come back in over the coast despite the fact that we did see more sun at our beaches today. and up to the north, we do have increasing fire danger. a red flag warning going up tonight at 8:00 p.m. for parts of northern california and runs until tomorrow evening. the biggest concern here is dry fileds with dusty winds expected to develop and low humidity. each that in mind. we love to see the marine layer from our east bay hills camera. it's running deep, 2,000 feet.

so count on more fog tomorrow morning. 65 in san francisco. 71 in oakland. 70s for san carlos. 64 in half moon bay. our high temperatures today in the mid 60s to the upper 80s. check out the golden gate bridge. half and half. some low cloud, some sunshine there. temperatures in the 70s santa rosa, napa. a beautiful bright view from our san jose camera showing you sunshine there. we're expecting fog along the coast overnight tonight. a wide range of temperatures for tomorrow. warming it up on friday. as a matter of fact, it's going to get hot. but for the time being, this little circulation off our coast is what was responsible for clearing out some of the clouds along our coastlines. the summer sea breeze is back. and that's what's going to push the low clouds and the fog back over the coast and in over the bay. tomorrow morning, you could see some spotty drizzle like this morning. we did have some drizzle around the south bay and santa cruz. tomorrow we're expecting the fog

to expand near the beaches. sunshine for the rest of you, and seasonal is what we'll call it for your thursday. watch out for this spotty drizzle tomorrow morning. temperatures will be in the upper 50s to the low 60s. with that fog around, especially around the coast, you'll have to be careful during the commute. tomorrow afternoon, 83 degrees in san jose. 87 in morgan hill. the south bay, it will be pleasant and 83. 74 in santa cruz on the peninsula. low 80s for mountain view. fog is going to hang on along parts of the coastline, so we'll hold your temperatures about the same as today. 66 half moon day. 71 in downtown san francisco. in the north bay. 84 napa and santa rosa. 60s along the coast line. in the east bay, 76 in oakland. 80 in union city. head inland, and it will be very warm to hot. 90 in livermore. 88 in walnut creek. the seven-day forecast, get ready for the summer heat on friday. 96 in our hottest locations.

68 on the coast. temperatures will dial back a little on the weekend, early into next week. i'm just enjoying the beautiful weather so i think i'll just stay out here. >> save a spot. we'll be right out. a new look for this year's comedy day in san francisco. the changes underway at a san francisco institution. and new at 6:00, the restoration effort now underway in the north bay that will turn back

dramatic footage, the moment a bolt of lightning strikes a bridge in croatia. lightning lights up the evening sky. it was part of severe storms that led to flash flooding in the city. the man who correctly predicted president obama's 2012 re-election victory has a new prognosis tonight. nato silver now runs the blog

538.com. the mid term elections are two months away, and he says there's a 64% that the senate will end up controlled by republicans. key states are alaska, arkansas, colorado, iowa, louisiana, and north carolina. nate silver says democrats have a 36% chance of keeping senate control. we'll see in a couple of months. meantime, bay area native tony west is leaving his job as number three man in the justice department. west was president obama's point man for settlements in the 2008 economic meltdown. however, west says his biggest accomplishment was his role in the justice department's decision to stop backing the defense of marriage act. west is returning to the private sector, and on a personal note, his sister-in-law is state attorney general camilla harris. organizers of an honor for pioneers of the lgbt community is putting a rain bow on its error. the sidewalk tribute to 20

people was unveiled yesterday, but it was discovered that two of the plaques contain misspellings. the group behind the tribute says it's come up with a positive twist to the embarrassing errors. >> the two minor typos in the text, those incorrect plaques will be auctioned off for charity. and we feel so strongly we should do some good from this. >> one plaque says that oscar wild has a bitting wit instead of a biting wit. private donations will be used to replace the plaques. the show must go on, as they say in show business. the organizers of san francisco's annual comedy day say they will continue with the day despite the death of robin williams. it features routines from dozens of comedians. williams performed in the first comedy day 34 years ago. even after he gained fame, he

still popped in for surprise visits. >> sometimes he wouldn't decide until day of. and it was ok, i'm coming. it was like, all right. just let me know when you get here and we'll make sure you can get backstage without being bothered by too many people. >> this year, comedy day will begin with a special tribute to robin williams. some of the headliners include will durst, margaret gomez, and market cho. the event is free, and takes place on sunday, september 14, in golden gate park.

coming up, new at 6:00, how will the building you're in right now hold up in an earthquake? tonight, what it would take to install an early warning system in california. also, 7 on your side's michael finny looks into whether the napa quake will shake up home values. you know, it might be not as bad as you think. and an academy award winner

makes a case for doing business in the cloud. those stories and much more coming up in half an hour. >> well, this is a nice one. wild care is looking after this pair of 6-day-old raccoons abandoned by their mother. >> oh. wild care has admitted 90 raccoons this year, the majority orphaned babies needing around the clock care. >> these two will go into foster care for about two months and then be released on new year's day 2015. a pet owner in sicily attached a go pro camera to his dog's back. >> walter the labrador is excited to enjoy the last few dog days of summer. when he is let free of his leash, he takes off down a winding path. his owner says he really loves the sea. >> he runs right through beach goers and plunges happily into the mediterranean. you go, walter. fun. "world news tonight" with

david muir is next. we appreciate your time. see you again at 6:00. welcome to "world news tonight." inside the urgent manhunt right now. the brutal terror group isis and the hunt for that masked man. tonight you'll see the new clues right here, what these videos could reveal. brian ross standing by. the survivor speaks, tonight the american woman who came down with ebola. describing to us the moment she learned, forced to talk to her husband through that glass, just as we learn tonight about the new case, another american infected. late word tonight about joan rivers, what they've now done at the hospital. and a made in america quiz for you. what do our fighter pilots, robert redford, and tom cruise all have in common? it's creating jobs tonight. >> made in america!