You know, its still a mystery really. Well be looking into that. Reporter and finding tell tale signs of a potential rock fall is often impossible. Things are happening within the rock. They are usually not visible to us. And so after the rock fall occurs, we can see a lot better what was going on in there after the fact. Reporter with 150 deaths from 2006 to 2016, yosemite was the nations second most deadly National Park second only to lake meads 254. People falling or Natural Causes such as heart attacks while hiking are the most common reasons. Rock falls are very few and far between. We have a rock fall of the size that we saw yesterday every few years. The past 150 years there have been 1,000 major rock falls. Thats about 7 a year for the last 150 years. But few have ever claimed any lives. Even counting smaller falls, there are only about 80 significant yosemite rock falls a year. Thats enough to report. There are thousands and thousands too small and spread out over the parks almost 1200 scare miles. The size of those slabs that fell, its remarkable. How can they say with authority that its safe now. Reporter i think its fair to call that a highly educated guess. These are professionals and they know what they are talking about and they can look at the area where the stone fell from and look over on the other sides and they can say, okay, this appears to be uniform, this appears to be something that is cohesive and all of that stuff. But one has to remember that those big pieces that fell away were also supporting those side pieces so its a highly educated guess and this has been going on forever. This is the natural wonder of yosemite and its also the natural danger and people need to be aware of that. But is there a great chance of being killed or hurt by a rock fall . No. Is there any particular kind of year when things happen more often than another time of year . Reporter no. They happen all the time. This is probably the least likely time for it to happen because they usually happen after big swings in temperatures or big swings in precipitation. Now, we did have a lot of precipitation and heat this summer and it is conceivable that deep into the rock, 26, 27 feet deep into the rock it took that long to cool and heat the stones in order to do that. But its just as likely this has been going on for decades if not millenia. Thank you. San jose police are searching for multiple suspects wanted in connection with a deadly shooting. Investigators tell ktvu they have not turned up any new clues after a night and day of searching. As ktvus jesse geary shows us, from our san jose studio, its not just a crime thats shocking neighbors. The location is also turning heads. Reporter . I used to think it was a safe area. Reporter we heard that a lot from neighbors and residents of this sprawling North San Jose apartment community. Police say the deadly gunfire took place in a first floor unit in this building on elon village lane. The victim was shot at least once and was rushed to a nearby hospital and was pronounced dead shortly thereafter. A Home Invasion preceded the shooting and some neighbors say sometimes security can be sketchy with recent acts of robbery and vandalism. Posted on the apartment complex website. Security is an issue here, our cars are constantly being broken into bashed in with, i dont know, hammers or whatever. You cant jog at night. And they had to take down one. Atm machines because people got robbed. That scares me because i dont know how they get into it. Reporter homicide evidence are processing evidence from the scene but so far have no clues in a crime that has rocked this quiet Residential Tech worker bubble. We will keep our doors locked and bolted. Reporter homicide detectives have no information on suspects at this time. In the san jose studio, jesse gary, ktvu fox 2 news. New information tonight in the death of a man after he was tased by police in oakland. Our Crime Reporter henry lee is here now with what he learned today. Henry . Reporter the family of the man is grieving. They dont know why he died while in Police Custody and now they have reached out to a high profile attorney for advice. It all started with a crash involving several cars at 42nd avenue and foothill boulevard in east oakland. All of a sudden i heard a big bang. Reporter a man involved in the crash tried to flee. At one point he tried to get on a bus. When officers confronted him, they say he resisted arrest. He was fine with the officers. Reporter sanchez says an officer yelled out repeatedly before using her taser. Im going to tase, you stop, stop. He kept yelling, im sorry, im sorry, please help me [ yelling ] [ radio chatter ] reporter Oakland Police called for paramedics after they shocked him. Our cameras were rolling when the man was taken into an ambulance. Sanchez confirms the man on the gurney is the same man he saw tased. The man died later that evening at a hospital. It surprised me that he is dead, though. He didnt look like he was injured. Reporter the Alameda County coroner will conduct an autopsy to determine the cause of death and whether the taser or any drug or alcohol use or car crash played any role. Sanchez says there may be another factor. He says after the man was tased, he fell to the ground. It look like he may have gotten hurt when fell to the ground . Yeah. It looked like he hit hard. Reporter the oakland civil rights Attorney Says the mans family has contacted him. He would not identify the man. He said he was divorced and had a job. Was it part of a car accident . Did he get injured in a car accident . We want to know what effect did the taser have on the cause of his death. Reporter Oakland Police say they are still gathering information, contacting witnesses and reviewing surveillance video. The mans death is also under investigation by the Alameda County d. A. s office. Live in the newsroom, henry lee, ktvu fox 2 news. Henry, do we know anything about the officer who fired the taser . No, the witness i spoke to say it was a female officers who repeatedly warned him. Oakland police are not saying who the officers are. Henry lee in the newsroom, thank you. Embattled health and Human Services secretary tom price resigned this afternoon after using private jets for government travel reportedly spending more than 400,000 of taxpayer money on charter price. He promised to repay about 52,000 of that total. President trump said earlier today he was considering firing price over this scandal. The resignation of tom price comes as President Trump and republicans are trying to sell their tax overhaul plan. The president spoke before the National Association of manufacturers in washington, dc this morning. The white house says the nearly 6 trillion tax cut plan will reduce taxes for corporations, simplify tax brackets, and nearly double the standard deduction used by most tax filers. We have a once in a Generation Opportunity to pass tax reform that is pro growth, pro jobs, pro worker, pro family, and pro america. The president promised the plan will substantially cut taxes for everyday americans. However, an analysis that was released today by the Tax Policy Center and the Brookings Institution found that the top 1 of taxpayers would receive half of the benefit. The bottom 95 would see cuts averaging just over 1 . Secretary of state Rex Tillerson is ordering all nonemergency American Employees and family members to leave cuba cutting Havana Embassy staff down to 60 . The u. S. Is also warning americans against traveling to cuba. Secretary tillerson made that decision as a result of mysterious sonic attacks against american diplomats in havana. The attacks caused a wide range of problems including hearing loss, nausea, headaches, earring and concussions. Cuba insists it has nothing to do with the attacks. A deadline is looming for people who are protecting by daca. After next thursday, october 5th, renewals for the program will no longer be allowed. There are reports that people are now lining up in Southern California to get a spot at a legal clinic that helps immigrants with their paperwork. The deferred action for Childhood Arrivals Program protects nearly 800,000 children brought to the United States illegally, from deportation. In order to keep up with californias growing population, the state needs to add 180,000 new homes every year. And today the governor took a big step toward accomplishing that goal by signing 15 bills aimed at boosting affordable housing. Ktvus Tara Moriarty was at the signing today in San Francisco where the lawmakers behind those bills gathered to show their support. What [ applause ] reporter Governor Brown sealing the dealing on 15 bills while flanked by state lawmakers. Their strongest response in recent memory to californias Housing Affordability crisis. Today you can be sure we got 15 bills. Reporter lawmakers impetus for pushing through the legislation . The homeless. We are not just talking about folks who are mentally ill who are chronically homeless. We are talking about families who are barely hanging on by a shoestring. We see it here every day in the bay area as we stuck in traffic next to super commuters who spend two hours driving from a home they can afford to a job that allows them to afford it, driving over growing encampments. You go into homes where people have an apartment, i bet most of them are struggling to make the rent. Reporter the socalled good bills signed at hunters view an houses who project in San Franciscos bayview neighborhood included new fee on real estate transactions and a 4 billion bond on the 2018 ballot that together could raise about 1 billion a year to help subsidize homes for low income residents. One bill authored by Nancy Skinner of berkeley streamlines the permitting process so that housing projects dont get bogged down by bureaucracy. Getting a permit to build housing should not be a shell game forces. Reporter david chiu the fight was personal. I have a toddler at a time when our millennials in california over half are thinking of leaving california because of housing costs. And my wife and i wonder whether he is going to have a place in our expensive city. Reporter while its not a panacea, he says the new laws are a step forward. This will ensure that my son has a shot of being able to live in the best city in the country someday in the best state in the country. Reporter in San Francisco, Tara Moriarty, ktvu fox 2 news. A different angle on the detainment of nfl player michael bennett. He is accused police of racial profiling. Now we have the officers body camera video. Also ahead, microsoft is moving in and spending millions on land. What its expansion plans could mean for the south bay. And a Bay Area Company doing its part to help the people of puerto rico. What tesla is bringing to the island nation. And here comes the weekend. Well set you up with the forecast for saturday and sunday. Just know its not going to be as warm as this week. [ music ] we can now use a blood sample to detect lung cancer. If we can do that, imagine what we can do for asthma. And if we can stop seizures in epilepsy patients with a small pacemaker for the brain, imagine what we can do for multiple sclerosis, even migraines. If we can use patients genes to predict Heart Disease in their families, imagine what we can do for the conditions that affect us all. Imagine what we can do for you. Two Police Officers investigating a stolen car in georgia were shot and one of them has died. The officers were searching for a person connected to a deadly shooting near atlanta this morning when they responded to a report of a suspicious person in a stolen car. As the officers approached the car, the suspect came out of the nearby woods and shot both of them. One of the officers died. The other officer was shot in the chest but he was wearing a protective vest. Authorities say tonight he is in good condition. Police captured the suspect after a manhunt that lasted for several hours. The problems in puerto rico remain and are even getting worse for some. Nine days after Hurricane Maria slammed into that island, fox news phil keating shows us the desperate situation and the reaction from President Trump. Reporter puerto rico still largely without power, food and clean water nine days after a hit from Hurricane Maria. The situation is dire and getting worse for many residents, especially those in remote areas. President trump is praising the government response so far promising puerto rico wont be forgotten. But he is also raising best whether the feds will foot the bill for the longterm recovery saying thats something local leaders will have to negotiate along with the islands 70 billion debt. Well have to really start all over again. We are literally starting from scratch. Reporter we are seeing more aid arrive in the capital but many residents say its not getting to the areas where its needed. Officials blame major damage to roads and a lack of communication infrastructure. But people here say they need help sooner rather than later. [ speaking spanish ] the aid is too slow. They say it is coming from the United States but who are they giving it to . Because i havent received any at my house. Reporter thousands are lining up at the seaports and airports trying to evacuate. Many sent their loved ones to miami or other mainland destinations until the situation in puerto rico stabilizes. [ speaking spanish ] they dont have electricity here. Sometimes they have water, sometimes they dont. Reporter acting Homeland Security secretary elaine duke visiting puerto rico on friday one day after being harshly criticized by the mayor of san juan. This after duke called this a good news story. The mayor responded, no, this is a people are dying story. In miami, phil keating, fox news. New at 5 00, ktvu has confirmed tesla is sending Battery Systems to puerto rico. The systems are capable of being recharged by the sun. Tesla began the work as soon as the hurricane left the u. S. Island territory. And the company has tesla employees there installing the Battery Systems. Tesla founder elon musk is already donating a quarter Million Dollars to the relief effort there. Lets talk about our weather now, bring in our chief meterologist bill martin. I say this a lot. Its always awkward to go from Something Like puerto rico where they are just devastated to our weather and its absolutely beautiful. Yeah. Its always been that way. The weather out there especially Hurricane Season and tornado season, can be so deadly and so dramatic and yeah, i know it is tough. Thats one of the hardest parts about the job making the transition. Its a great day, the weekend. People without power. Its the nature of of weather and the nature of different regions of the country, you know . So we definitely keep thinking about them and you might be thinking about your bay area weekend. So hope you are. I hope you got both days off. I was talking to the Security Guard out front. How ready for the weekend . Richard working at the gate. He goes i work saturday night, sunday. And i go oh, yeah. I hate doing that have a great weekend but he goes my weekend is monday, tuesday. So its not saturday, sunday but its monday, tuesday. So i hope you have the weekend off. Hope you get a chance to do some stuff because the weather is going to be stunning. We are talking about temperatures tomorrow that will be generally cooled down a bit. Temperatures tomorrow will be warmer than today. We have a kind of a brief warmup and then another cooldown again but you see where the arrows are now. Thats a little more northerly. So that indicates we are going to see a little bit of north wind as we get into tomorrow afternoon and evening. And that will create we are going to get a red flag warning in the Higher Elevations of the north and east bay kind of similar to the last event and temperatures will spike up a bit. Right now its 77 in fairfield. Tomorrow at this time i suspect fairfield will be up in the 80s easily, probably upper 80s. Look how much cooler it is than yesterday. Fairfield 14 degrees cooler than yesterday. With the quick switch of wind direction, this fog is going away. The fog goes away, um, thats how now that the High Pressure is generally in the area. At least in this instance. So big marine layer now. Thats where the cooling comes from. But the fog is going to get suppressed and gone most likely by tomorrow afternoon and that sets us up with a warmer day on saturday. And you can see the high fire danger increased fire danger and listen, they could issue one of these bad boys almost every day until it starts raining, these red flag warnings, because youre looking at temperatures that are going to get up there with wind gusts. But its just fire season, thats all there is to it. So really, i treat every day until we get that first big rain like its a, um, like its a red flag warning especially in the east bay and north bay littles and south bay hills, too. So its dry saturday, the red flag warning goes away sunday morning. Forecast overnight lows in the 50s. Forecast daytime highs are going to be there is