it is hard to know she is gone. >> reporter: his defense attorney told jurors the active stabbing nia wilson is not going to be in dispute. but that her clients mental health is. she said john cowell who has a history of schizophrenia sought treatment for voices in his head telling him to hurt other people days before nia wilson was stabbed and killed. i would like to see him go to prison and they lock him up and throw away the key. that is the only thing. it is not going to be bringing nia wilson back but it will be justice. >> reporter: the first three witnesses in the case have already been called. the first two technicians from bart and bart pd describing the process of getting that surveillance video into investigators hands the third witness the officer who found john cowell's pants and the knife believed to be use to kill nia wilson. all of these cases the defense attorney chose not to prep cross-examine any of the witnesses. a live look at downtown san francisco right now. dozens of demonstrators awaiting signs gathering and protesting in the wake of president trump's impeachment acquittal. just reject the cover of raleigh. one of 20 plant in the bay area. organizers say the impeachment proceedings were never a child. but a gop cover-up. of the presidents crimes. in spite of the impeachment trial president trump a bank his highest approval rating ever in the lead up gallup poll. nearly half of voters approve of president trump's performance in office with support increasing within the republican party and among independents. nearly 200 americans evacuated from the coronavirus outbreak zone are being quarantined at travis air force base. among the 350 passengers that landed at the base this morning. the other flight refueled at the base is now in san diego. two more charter planes are expected to arrive in texas and nebraska tomorrow. so far there are 12 cases of the coronavirus in the u.s. six of those are in california. 4 in the bay area. julia is live outside travis air force base where she spoke to a father whose family is inside the quarantine zone.>> reporter: they are utterly exhausted spending their first night out of what could be 14 quarantined. i also want to tell you there was a child on that flight who had a fever. and has been taken to a local medical hospital for testing. right now no one has been diagnosed with the virus. it may not show up for another 14 days. we recognize this is an unprecedented action. we are facing and unprecedented public health threat. >> reporter: the charter jetliner arrived at travis air force base this morning. on that quarantined plane daisy and her two young daughters ages five and 10 months old. exhausted is relieved the overriding emotion. >> reporter: her husband is waiting for his family to come home to wisconsin. he will have to wait at least two weeks. he spoke to him this afternoon. baby wipes and diapers a little playpen a play mat. it seems like they have really tried to think of everything to make this quarantine as enjoyable as a quarantine can be.>> reporter: what is life like inside of their? can they interact with other people? what did your wife tell you? i don't know. she hasn't told me much. it doesn't sound like she is bound inside. it seems like she is able to go outside. most of the people are wearing masks. i don't know if that is a requirement or voluntary. po: his and daughters were in china visiting family for the outbreak of the virus. they are among the 178 other american citizens staying at the cordoned off westwood in on- base. because of high risk of exposure. they are screened and monitored daily by medical professionals. we have people on the staff who are working to put together activities. we want to maintain some social distances before between family units.>> reporter: as for life at travis air force base and extending into the county area. it is business as usual. this hotel westwood in is a quarantined area. personnel and military personnel are still showing up to work. i spoke with a retired military nurse. she has an appointment on the base tomorrow. she said it hasn't been canceled. stay with us for the latest information on the coronavirus. you can always get news updates any time on cbsn bay area. it is available on all your favorite devices. rideshare drivers bringing a wage fight to the state of california today. they rallied in several cities including san francisco. demanding to be reclassified as employees. under california's new gate worker law. the file claims with the state labor commissioner's office seeking wages over time and other expenses from the past three years. but two of the companies uber and live want to keep them as contractors and provide benefits like been minimum wage we talked to a driver who has been on board with that plan. currently we have freedom and possibility. if we are forced to become employees we are only going to be able to work for one app. i don't know how else it would work. we reached out to the companies for comment on today's rally. so far no word back. we just learned 49er ceo jed york is donating $300,000 to defeat a city of santa clara ballot measure. why the team is getting involved. this all started in december. people in santa clara reported getting calls. it was a telephone pole about measure c. santa clara city clerk actually got one of the calls himself. is that the poster asked leading questions. included a lot of questions and attempts to influence voters opinions towards measure c.>> reporter: proposes to redraw the six districts in the three. two councilmembers in each. from a status family member said measure c would dilute votes from minority groups. the people that control the politics would like to have less districts so they can control the city. >> reporter: january 14 he asked the public for tipster leads about who was behind the anonymous calls. even issued a warning about a violation of the city's dark money ordinance. a short time later he said he uncovered evidence implicating putting minors executives. but would not say exactly what he found. we caught jed york and the 49ers meddling in santa clara elections by failing to disclose the opposition of measure c. that is a violation of the ordinance. anybody is free to support or oppose any ballot measure. the only thing is you have to own up to it. >> reporter: the 31st to send a warning letters to putting minors top executives including the owner. on monday the city clerk's office received this filing indicating jed york donated more than $17,000 to the no on c campaign. i think the timing speaks for itself. he is making a mountain out of a mole hill. >> reporter: he accuses the city clerk of politicizing the issue when he should be impartial. you say the 49ers i can say they broke the law. >> reporter: if measure c fails in the kitty the city keeps the districts the new faces on the mighamong other things be open to more concerts and events at levi stadium generating millions of dollars from the city and the team. the 49ers issued a statement measure c threatens to disenfranchise minority communities and strip them of equal representation in our local government. no amount of manufactured allegations will distract from the fact the measure c is antidemocratic and on the wrong side of history. san francisco taking new steps to beef up safely in neighborhood that has struggled to improve for decades. the mayor unveiled the sf pd midmarket foot beat office today. it is on the ground floor of the proper hotel along market street. the office will serve as an outpost for police officers who patrol some of the most visible crime hotspots were drug dealing and open drug use are rampant. still ahead california scientists are creating a sci- fi sea creature to explore oceans. we will show you the cyborg jellyfish. east bay high school preparing for the future of automobiles. the self driving cars that will now be part of their class. a glimpse at the luxury apartments going on sale. how much it will cost you to get a view of san francisco and the east bay. there is no rain on the way. at least not for this week. we will have a look ahead which looks more promising when we come back. voip in action. mayor bloomberg and president obama worked together in the fight for gun safety laws, to improve education, and to develop innovative ways to help teens gain the skills needed to find good jobs. obama: at a time when washington is divided in old ideological battles he shows us what can be achieved when we bring people together to seek pragmatic solutions. bloomberg: i'm mike bloomberg and i approve this message. economically powerfully influenced my values. bernie sanders he's fighting to raise wages. and guarantee health care for all. now, our country is at a turning point. hard working people, betrayed by trump, struggling to survive. in this moment, we need a fighter. bernie sanders. we know he'll fight for us as president because he always has. i'm bernie sanders and i approve this message. he wanted a man cave but she to nature.be close so, we met in the middle. ohhhhh! look who just woke up! you are so cute! but one thing we could both agree on was getting geico to help with homeowners insurance. yeah, it was really easy and we saved a bunch of money. oh, you got it. you are such a smart bear! call geico and see how easy saving on homeowners and condo insurance can be. scientists at stanford university have found new ways to explore the world's oceans. don with more on their creation that seems right out of a hollywood movie.>> reporter: nearly 6 years of research scientist they they have been able to turn the common jellyfish into a cyborg. but why? part animal part machine. bioengineering scientist nicole is one of two working on the project. i create bionic jellyfish integrating microelectronics into these animals with hormone jellyfish mac they are energy efficient creatures. if we incorporate them with a robotic system we can take advantage of these natural animals to create a low powered robot. >> reporter: delivers its high knees jolt to the jellyfish stemming then relating it to swim faster than normal. the jellyfish has no brain and central nervous system and no pain receptors the jellyfish doesn't feel a thing. but why? in the future when we incorporate more mobility into the animals and adding different senses like measuring phr temperature or sampling different parts of the water. we can send the animals out some more environments sensitive areas of the ocean. >> reporter: they hope to stop on sensors let them go get data in areas we haven't been to yet. right now the only make them go or stop. still working on direction. how deep can they go? a couple thousand feet at least. it really depends. they are pretty ubiquitous. you find them and ate a variety of depths.>> reporter: stand for supplies the lab. at stanford university. one e. bay high school introducing self driving electric vehicles to its auto class. pittsburgh high school will soon launch its first advanced course on repairing and maintaining self driving electric vehicles. the contra costa transportation authority and local motors are helping the school get into gear. the auto company is donating $330,000 shuttle from for students to work on. the local motors engineering team will also visit the school every month to mentor students. did you rebuild an engine and high school? i love auto shop. we didn't have electric cars yet. they certainly did not. we have a look at the transamerica pyramid. in the milky skies. high clouds of top. we look at the point ahead of the pyramid. concourse 60 right now. mostly middle 50s and low 60s. overnight lows tonight down to the upper 30s and low 40s. little bit warmer than last night. it will feel chilly out there. venus is in the southwestern sky. he would do it with temperatures right now mostly low 50s. blocking ridges and place taking everything out on the pacific and sending it into washington state. between now and saturday it is mild. we get into the weekend and it will be much cooler. come sunday. low pressure is too far to the east it won't grab any moisture. we stay dry. drive through sunday anyway. there is no prospects for rain in the san francisco right through early next week. that doesn't include wednesday. things could change. clear and chilly tonight. the winds will lighten up. tomorrow sunny again with mild temperatures through saturday. just like last week and on sunday the numbers come down. the winds pick up. it stays dry. i temperatures tomorrow in the middle 60s in the bay area. in the extended forecast we will see a chance of rain coming in. after a breezy and cool sunday. i wednesday things might be changing. opening up the doors to a slightly wetter regime. we shall see in the meantime we've got sunshine on the way for the bay area and a pretty pleasant next couple days. former warrior taking his talents to south beach. three days after that devastating loss. does this thing any less for the 49ers? reaction is next. tom: my mom always told me louder than words. she was a school teacher. my dad joined the navy and helped prosecute the nazis in nuremberg. their values are why i walked away from my business, took the giving pledge to give my money to good causes, and why i spent the last ten years fighting corporate insiders who put profits over people. i'm tom steyer, and i approve this message. because, right now, america needs more than words. we need action. when it comes to your business internet, which is more important? ♪ ♪ okay, i wish i didn't have to choose. like the more i think about it, the more i want to jump to each room. if i said you can have it all? ♪ ♪ comcast business gives you connectivity that goes beyond. that's what we want! that's speed, reliability, and security, all from one provider. touchdown! get started with internet and voice for an amazing price. call today. comcast business. beyond fast. no matter how many times you watch the replay of the super bowl the result is always the same the players share your pain. is sought. i wouldn't want to put anybody in my head that monday morning. a watch for the first time last night. it made it worse. you hope the ship doesn't sink. for some reason the ship keeps thinking over and over. that feeling won't go away anytime. seeing the 49ers clean out their lockers. are ready for a break. but not to force buckner. his righback to work when he gets home. i have a baby on the way. i have to put together a nursery. that is a big plan right now. my wife has been getting on me about it. i don't have any excuses now. i have to get going. he was named the 49ers mvp. george kittle won the award. given to the team's most inspirational player. 49ers were looking their wounds the move was different in kc. the cold weather wasn't going to keep thousands of chiefs fans from showing up to celebrate their first title in 50 years. nobody enjoyed themselves more today than the kansas city tight end travis kelsey. fans have to love that. ready to party tonight. to the heat in miami is reportedly giving him a two- year deal. were $30 million. the former warrior will be back at chase center monday night. fans lined up at pebble beach decease of the celebrities in action for the annual pro-am. clint eastwood omari. this is the 40th anniversary of groundhog day. the tournament tees off tomorrow. i'm going with jason day. dustin johnson. you have moved beyond this 49er debacle. clint eastwood. jason day. phil mickelson. not necessarily in that order. we will be right back. the final $3 million for the three bedrooms the price for new condos. the five-story bristol will have 124 units. studios will be listed for 800,000. one bedroom condos 1 million. two bedrooms one .7 million. sales start in the spring and move into start in middle 2021. one of three luxury developments coming to the island. think of the view the view of the city. the commute three or four minutes. thank you for watching at 6 pm. the news continues on cbsn bay area. the evening news is bad. we will be back at 7 pm. have a good night. ♪ captioning sponsored by cbs >> o'donnell: breaking news tonight, acquitted. after being impeached by the house, the senate decides against removing president trump from office. they voted to acquit him on two articles of impeachment. >> donald john trump, president of the united states, is not guilty as charged. >> o'donnell: in a break from his party, an emotional mitt romney voting to convict. >> the president is guilty of an appalling abuse of public trust. >> o'donnell: tonight the president's reaction. the other breaking news, dangerous winter weather. as we come on the air, reports of tornadoes across mississippi, high winds pulling down scaffolding in new orleans, more than 60 million americans now under winter weather alerts. deeply divided. the president's state of the union showcases partisan anger acrossri