several hours ago crews resumeed their search of a three square mile area in vallejo, mike nemack joins us with that. >> reporter: we will get to that in just a bit. we want to get you up to speed on a new development. 10 minutes ago i saw a sheriff's boat being pulled out of the water here so i called him. i said hey what is happening. why are you pulling them out. he said there has been a new development. i said did you find a body. he said i can't confirm that, all i can say is we are expanding to a new area, we will get more on that later he said possibly 30 minutes. meantime we got new video we shot 30 minutes here north of us shows search and rescue crews pulling and poking at a comforter along the shore and also found an old white boat they left alone but definitely checked out. i would say in all 70 search and rescuers are looking for one missing woman. they are on foot, they are on the water. this is the search for oakland's sandra koch. >> we are also going to use dogs. they do have specially trained dogs that can search lakes. >> the lake is adjacent to 6 flags discovery king