if he came into court to testify that he believed that hunter biden wasn't using drugs. the point is prosecutors have evidence he was using drugs. it's not definitive. it's enough that they can continue to introduce it and use it to cross examine these witnesses, and so bottom line, james biden will not be appearing at this trial, and we'll wait to see whether hunter biden will testify in his own defense on monday, chris. >> they have the weekend to make the decision. ken dilanian, thank you. now to disturbing new video showing the moments before police say a woman stabbed and killed a toddler and stabbed his mother at an ohio grocery store. nbc's maggie vespa joins us right now. this attack happened in five seconds. what does this video tell us? >> you said at the top of the show, this woman unleashed hell on this ohio mother and her toddler. we have the surveillance video released by north olmstead police, a city near cleveland.