ktvu's melanie woodrow with what else we learned about the company's record. >> reporter: over weight trucks, faulty steering and failing breaks. just some of the most severe roby trucking company violations chp identified during inspections. 2 investigates obtained reports that show the violations were so numerous chp was keeping tabs on the company every 120 days. instead of every two years. it was in between inspections during one of the 120 day periods roby trucking company was given to fix violations that this crash occurred. witnesses say it appears the driver lost control of his vehicle and was honking and flashing lights in an attempt owarn others in his path. he crashed into an empty restaurant and died. >> reporter: [ inaudible question ] >> it is our policy to do that. by law we have to give them due process to fix the issues we identify. this could have been avoided if the company made sure their vehicle was properly maintained. >> chp doesn't know if the truck was sited. the reports say the company did not have a preventative maintenance program. chp has seized and frozen

melanie woodrow is live. good afternoon melanie. >> reporter: investigators are confident they will find several vehicles. they are not pulled any vehicles out of the bay just yet. but they will be out here several more hours. investigators discovered 21 vehicles that were believed to be linked to this chop shop. they expect that number to climb. they also expect the number of defendants in the case to go up. right now, there are four, but they expect the numbers to rise. they say the defendants considered themselves modern day pirates. to that end, check this out. some graffiti out here that actually says home of the richmond pirates. take a look at this graffiti here. as we pan around, we can show you this open field area that was part of what is being called a homeless encampment. according to investigators, they came out here and they saw a bunch of vehicles, boats that were chopped up at this homeless encampment. according to them, the defendants were taking the vehicles and stealing the parts they wanted

in december ktvu's melanie woodrow looked into health concerns.nvestigation was featured on the doctor ozshow today and tonight -- dr. oz show and tonight we are hearing from a family who says the issue hits close to home. melanie woodrow now with the story. >> reporter: this is a family that wonders whether or not a soccer field made from recycled tires caused their daughter's cancer. he practiced on the same field her entire life. tonight she is closer to potentially knowing whether her love for soccer may have hurt her. >> she knows what it feels like to be the last line of defense. >> constant adrenaline. >> reporter: she was defenseless to their greatest opponent off the field. at 15 years old doctors discovered she had thyroid cancer. >> pretty hard. especially when you had to tell her. >> i cried. >> reporter: thyroid cancer. a mystery to her mom. a nurse who says she nev lost hope. till one day when a phone -- never lost hope. till one day when a phone call provided a clue. she was compiling a list of athletes with cancer. mostly soccer pl

ktvu's melanie woodrow has an exclusive look. >> reporter: dive teams are not immune to being out at the bay but today was out of the ordinary for some. >> this is some of the most unusual thing we've done. >> reporter: the deputy d.a. says the first clue came after two defendants attempted to stole a boat. the victim described this get away vehicle. richmond police officers found it at a homeless encampment with a lot more evidence. >> we had an rv, seadoos. boat trailers, personal water crafts. everything. >> reporter: the defendants considered themselves pirates. their mark, a badge of pride. new information that there were more in the bay. investigators believe the defendants used this moving barge to dump the remaining vehicle parts. >> he is very stupid. you have these valuable cars, five, 10, $20,000 they're being chopped up and destroyed for a couple of hundred dollars. >> reporter: what is not easy, looking for the cars. using this underwater camera i can show you just how murky the water is. that's why these divers are using sonar. it lets them search a wider area over a sh

melanie woodrow and i stat down to talk about it. >> you can see these little blades of synthetic surf. basically, the crumb rubber, which is tire crumbs that are, you know, broken down. they've become the infilm between the blade. the problem is when you think about what a tire is, it contains toxins and chemicals and they could be potentially dangerous to a player. the issue is these little crumbs become like hitchhikers, they get in the players' hair and clothing and the real issue is for goal keepers. there is the goalkeepers' curse. they are diving for the ball. and the crumbs will get in their mouth. we've seen more and more of those goalkeepers develop cancer. the scientist is not there to say someone plays on this turf will again cancer but the problem the science is limited. the study haven't looked at many fields and haven't looked at ingestion as a route of exposure. and that's what this bill would do it passed. today they will debate a bill that senator hill introduced. it's calling for a study. basically a stuby was done previously and it was limited in the number of field

ktvu's melanie woodrow spent the day with divers. this started with what a victim saw? reporter: that's right. it was this vehicle. a blue and why bay liner that cracked open the investigation. >> reporter: dive teams aren't new to being on the bay but today's search was uncharted territory for some. >> we believe there are chopped up cars in the bay. >> reporter: chopped up cars and possibly watt craft that was stolen. the contra costa county deputy district attorney said the first clue came after two defendants attempted to steal a boat. police officers found it at a homeless encampment with more evidence. >> rv. sea dos. boat trailers, everything. >> reporter: they consider themselves pirates. after making arrests and recovering 21 vehicles, new information that there were more in the bay. investigators believe the defendants used this moving barge to dump the remaining parts. >> very stupid. you have valuable cars, 14,000 bucks, chopped up and destroyed for a couple hundred bucks. >> reporter: one of the biggest challenges for divers and visibility. using the camera

groups fear it has contributed to more than 100 cases around the nation, 2 investigates reporter melanie woodrow will appear on the dr. oz tv show today she'll be talking about her crumb rubber investigation and she will be joining us here mornings on 2 coming up at 8:15. >>> kraft is recalling about six and a half million boxes of macaroni and cheese which could contain pieces of metal the original flavor sold individually and multipacks, best when used by date between september 18 and october 11 of this year, 2015, and the code c 2 below the expiration date. kraft says eight people have reported finding the metal fragments but not aware of any injuries at this point, we do have information for you check out ktvu.com, just type kraft in to the search box you'll find all the information you need to know but boy a lot of people probably have that in their cabinet. >> oh yeah. >>> time now 5:15, we have sal if you have a moment, can you take me to the bridge? >> absolutely, dave, i will do that for you. >> oh, they have it! >> there we go, i like that. you know, i knew that dave was in that mood,