. >>> coming up in sports, nolan smith talks lock out. plus mike shanahan knows what continues. >>> a judge makes a key ruling in a pretrial motion in the lemon trial. jurors will be abe to see and hear a video. norwood says murray says she was going to talk to the manager. she was found murdered in march. >>> students in louisa, virginia talk about scrambling to safety. they had a tornado yesterday. the severe weather blew through as they were boarding buses to go home. >>> occupy wall street protesters will stay at their home base for now. the news led to celebrations and clashes with police. at least a dozen protesters arrested. >>> back to the mystery in germantown. a mother found murdered and her son missing for weeks. >> one of jane mcquain's best friends is speaking out and talking about the concerns she had. we have the exclusive report. >> reporter: for jane mcquain's best friend, the last 24 hours have been nothing short of excruciating and painful not knowing where jane's son might be. >> i'm holding on. it's all i can do. >> s

nolan smith. he's hoping there's an nba season. i hope there's an nba season and you are too. back to you. >> all right. thanks. >>> after the break, young and >>> arlington county police arrested two people for stealing used restaurant cooking oil. the thefts have been happening all over the region. the booming biodiesel market helped turn it into liquid gold. >> reporter: we are in the parking garage of a boston mall. this is the center of the investigation. they dump their used oil into the large containers. the thieves were coming here and siphoning it out. it's worth $3.50 a gallon. these two men were caught in the act of stealing cooking oil. nabbed during the day under a surveillance camera by security cameras. why are they stealing the stuff? >> i don't know. it's our oil. >> reporter: police say they are facing multiple charges inclu including grand larceny. it's sold in an underground market to rendering companies that use it to make chicken feed. >> it's a waste by product but worth $3.50 a gallon. >> reporter: biofuel companies convert it to clean burning biodiesel

nolan reporting live from los angeles. back to you. >> okay, conan. thank you very much. president obama with will smith and melanie griffith among the v.i.p.s and tomorrow here at the "w" hotel in san francisco. traffic, needless to say, will be affected by the presidential visit, mostly in san francisco south of market near the w hotel. notable street closures between 11:30 and 4:00 p.m. tomorrow. northbound 3 ird from fullsome to mission and southbound new montgomery from mission to howard and really the intersection of third and howard will be the met affected. >> new worries tonight resurfacing in livermore where the lawrence livermore lab is planning a contamination cleanup. there are some concerns about whether it's a good idea to do that and whether it could be more harm than good. nbc bay area's jodi hernandez joins us live in livermore where the plans are fueling, some fears about plutonium, jodi? >> reporter: jess characters i'm standing inside big trees park, a park where they received plutonium here decades ago. many people in this area call this park plutonium park. tonight old fears are b

. >> reporter: if nolan north is part of an insurance fraud scheme like that, it's an opportunity for the police. the idea? have an undercover detective, chris smith pretend he's behind on his payments and wants to give up his car to collect on the insurance. >> i'm going to sound desperate. i need to get rid of this car. i'm scared. hey, look. >> perfect. >> reporter: if the tow company seems interested, the police will use this red chevy blazer as bait and try to follow it all the way to the chop shop. >> okay, eddie. they're going in. >> reporter: after weeks of planning and surveillance of the tow company, the undercover detective pulls into the yard. riding as a passenger in this white car and wearing a hidden police microphone. before long, the tow company boss, sal capozi, walks over to the car and starts talking business. >> what's going on? if you got the small blazer, it's got the small motor. >> reporter: as police listen from a nearby surveillance van, capozi tells the undercover cop he knows how the insurance scam works. >> what they would end up doing to the thing is taking the thing apart. gutting the interior. that way the person t