police say that michael eiliff was shot and killed by darion williams on saturday. afterwards officers say williams robbed a store, shot a man and two first responders in antioch. police say that williams was later arrested in richmond after a chase with the chp. eiliff's family said he was letting williams' young son and the child's mother stay with him. police are now searching for the two saying they may be in danger. >> reporter: did you know he was taking in a mother and child? >> no, we didn't know anything about it. he didn't talk to us about it. i think he was trying to help her. >>> let's take a live look across the bay area this evening. san francisco, marin county, and san mateo counties could soon pave the way for high school students to return back to class and possibly indoor dining. meantime, andrea nakano reports researchers are seeing an increase in coronavirus variants across the state, and there are signs it could cause severe disease and could spread more quickly. >> reporter: yes, scientists have seen a high number of the california variant, and