It was not an experiment. This was a saturday night. About 7 00. There was nobody else around. He brought materials to produce this meth. Reporter bartley quit his job at nist one day after the explosion and expects to go to prison, his Attorney Says. He certainly realizes that is a likely scenario that could occur. Reporter prosecutors say bartley could face five or six years in prison. His sentencing is scheduled for late november in the same courthouse. New at 6 00 tonight, the email Chris Bartley wrote his boss hours after the explosion. Wendy . Scott mcfar land. Two dozen people facing charges in connection with a major Drug Trafficking bust on marylands eastern shore. Police say they are in the process of dismantling an organization that they think distributed heroin and other drugs throughout the region. Over the past month, they have recovered large amounts of heroin, marijuana, cocaine and molly. They also say they found 50 guns and that includes a grenade launcher. We are told the drugs have a street value of nearly 13 million. New developments tonight with restructuring at laurel regional hospital. Our Prince Georges County bureau chief, Tracee Wilkins, broke this story today and is now reporting that the hospital will close its mat teshity ward. That move will impact 38 employees. It will be effective in early october. Dimensions health care system, which operate the hospital, tells us its working with those employees for possible job placement else where. We told you last month that Laurel Hospital will downsize to be a walkin patient medical center. You know, i just love him to death. Dont get me wrong, i love him. But every every year. Every year , he gets hurt. Well, bless his heart. It is every year, something we are all too familiar with Robert Griffin iii going down with an injury. Here we go again, folks. This time, its a concussion and some say the head coach is to blame. Our Darryl Moloney was at the game last night, she joins us. What is the latest and is the criticism of jay gruden fair . A twopart question. We, like us, the first quarter, watching like. This you can see it coming. Griffins concussion, we are going to start with that not too severe. We could see griffin against the ravens next saturday but after what happened last night, its still a big question mark. As for the criticism, this is why, griffin getting hit early and often and hard. Granted, he was without one of his best linemen to protect him and with several rookies assigned to the task, but painful to watch rg3 being punished on nearly every play. So, it was surprising to see him come out in the Second Quarter, when he was ultimately knocked out of the game. Jay gruden taking a lot of heat but defending his decision to keep griffin in the game. Well, we werent doing i want to try to get something going on offense. You know, theres a lot of quarterbacks play into the Second Quarter in a preseason game. Im not going to lay any blame on the quarterback, offensive line, wait and see. Not a very good performance by our first team offense. So, got a lot of work to do. Could you argue either keep him in or take him out, anyone watching do see it coming, to point out all those potential starters on the oline were there except for the one, a threetime pro bowler, the way the season is going to go sometimes. Out there naked for a lot, like completely vulnerable. Painful. Yes. Thank you, carol. We will see you at 6 00. We want to know if you think rg3 should have been pulled from last nights game earlier, call or text the number on your screen and enter 1 for yes, 2 for. No our Tracee Wilkins has been out all day asking about the game, results of what she is getting and results of the vare in about 45 minutes. Here at the live desk, we have been keeping a close eye on wall street which just wrapped up a rough week, the dow jones taking a dive. The dow shaved off more than 500 points today due to concerns about Global Growth slowing down. Investors are eggs specially concerned about the economy in china. This week alone, the dow fell more than 1,000 points, which means its down more than 10 from its alltime high in may and that meets the definition of a market correction. Its the first time the dow has been in socalled correction territory in four years. Todays downward slump hit all the major indexes. The s p ended the day more than down more than 64 points. The nasdaq fell 171 points. Bad day all around. Wendy . All right, chris lawrence. Amtrak is preparing to beef up its service ahead of next months visit by the pope pope francis. Gram track says it is going to have more trains, more cars to accommodate all those crowds. While the pope is here in d. C. And in new york, amtrak will be operating a normal schedule with extra railcars. During his visit to philly, there will be 12 extra trains going to and from the city. Reservations will be required for all acela northeast regional and key stone Service Lines that weekend. First 4 Traffic Alert four, in an hour, crews will close off a bridge downtown that could impact your weekend if youll be near the tidal basin. We are talking about the tidal reservoir in la bridge that connects east and west potomac park via ohio drive. As of 6 30, the brim will close. Crews will be replace the bridges concrete deck. We are told the bridge should reopen in time for the monday morning commute. And a heads up if you plan to use the stadium armory metro station this weekend. Metro Transit Police are conducting a fullscale Emergency Response drill on sunday morning at that station. And during the exercise, the Emergency Responders will be simulating a smoke and fire incident in the tunnel. There will be more than 100 participants from the d. C. Police, fire and homeland security. This exercise will start at 7 45 and go until 10 00 in the morning. Back open, thats what the sign outside caulkins jewelers gifts in leesburg reads now back in june, a blaze in an upstairs apartment just about destroyed the inside of the store. Owner Stanley Caulkins thought he was going to have to relocate. He has run the place since 1962. Fortunately for him and his customers, after a couple of months making repairs, they have been able to reopen in the same spot along king street. A woman is shot and killed in front of her house. The gunman ends up in a standoff with police down there. Its been going on for hours. Its still going on. Im pat collins. I will have a live report. Wendy . Plus, a local disabled veteran charged with destruction of property for painting a picnic table. Come on. How he got kicked out of his you n now several streets in brook lands are closed off. Police are dealing with a barricade situation with a man suspected in the murder of a woman in her 60s. Lets go right to pat collins. He is live at the scene in northeast. What are you learning . Reporter take a look down 18th street. You can see the s. W. A. T. Team down there in place, they have been there for hours. The focus is on a house down there. They believe theres a murder suspect inside the house and they are trying to get him to surrender. For hours and hours, s. W. A. T. Teams surrounded a house on 18th street northeast. Cops positioned on the porch. Cops all around the yard. Cops down the street, crouching behind their cruisers, just in case. Can we help you, they called out . Can we help you . Police say the man in the house is a suspected killer, wanted for the shooting death this morning of a woman in the 3700 block of 18th street. The victim and the suspect, police say are family members, the motive, some sort of family dispute. The victim is said to be a retired metro bus driver. Today, i talked to one of her friends. Just retired two years ago. And then for her to die this way . Die like this. Especially a good person. She would give you the shirt offier her back if she had to give it to you. Just how she was. I know that family is going to miss her. . The 99th murder in our city this year. Thats more than a 35 increase over the same time last year. On the scene today, ward five councilman, kenyon mcduffie, he represents this neighborhood. Another sad day in the city. Another day where we have got to face the reality, the harsh reality of a homicide. Reporter so the standoff here continues. Time is on the cops side. The longer they wait, the better chance they have of bringing this to a peaceful end. Coming up at 6 00, police chief cathy lanier. I will see you then. Now back to you. Pat, thank you. As pat reported, the victim in todays shooting is the citys 99th homicide victim this year. Thats 36 spike from the same time last year. In fact, in all of 2014, we saw a total of 105 cases. We posted an interactive map for you where you can see the latest stats and a map of all of this years homicides on our nbc walks app. You can find it by searching d. C. Homicides. The man who led police on chase after a carjacking in d. C. Had just been released from prison. Police say guy hernandez was released from the Montgomery CountyDetention Center on monday. Officers say 30 minutes after he got out, he was carjacking a woman at knife point about a mile from that prison. On wednesday, officers say he carjacked another person in the district and led police on a chase in beth these d. A. He was eventually arrested when he came back into d. C. New developments tonight and the story of a lost little boy. D. C. Police just told us they have located one of his parents. Hundreds of you shared his pictures on the nbc washington Facebook Page when police were looking for his parents. The toddler was found alone early this morning on benning road northeast near the hecken jer mall. This evening a local School Community will gather to remember a principal who passed away earlier this week. Wooten high school in rockville will host a memorial starting at 6 00 tonight in honor of dr. Michael doren. Dr. Doren had been principal of wooten for the past 12 years. He worked with Montgomery County schools for nearly 20 and spent more than four decades as an educator. Police found doren dead in his apartment earlier this week. They believe he died from natural causes. New developments this evening in the Hillary Clinton email controversy. Ed Reuters News Agency has examined the emails that have been made public so far and found at least 30 email threads that include socalled Foreign Government information. Reuters reports u. S. Regulations suggest this information should have been automatically assumed to be classified. Clintons campaign argues the state department has said none of the information was classified at the time it was sent. Donald trump is a hot ticket. People are already lining up outside the stadium in mobile, alabama, where trump is planning a rock star rally. Trump staffers say tickets are sold out and they expect 36,000 to attend the republican front runners rally. If so, that would break a record that was set by president obama during his 2008 election campaign. Theres also a push to get comedian and former daily show host, jon stewart to moderate a president ial debate and it is gaining momentum. More than 185,000 people signed a petition on change. Org. They include former Maryland Governor and democratic president ial candidate, martin omalley. Organizers are now just 14,000 signatures from their goal. The petition cites stewarts experience interviewing heads of state and members of congress. The Debate Commission has not commented on this petition. Hug guess is under fire tonight after several parents claim they found pieces of glass in huggies baby wipes. A mother posted this video that allegedly shows what could be shimmering shards of glass. Other angry parents took to social media today, posting their own videos, photos and stories of alleged tainted wipes. Hug guess issued a statement on its Facebook Page saying it takes concerns about its producproduc products seriously and working with this parent to figure out what happened. How the father of two got caught in a prostitution sting in maryland. Something different on metro this week, four stations shutting down completely this weekend. So the closures start at midnight tonight on friday. Heres whats going to be closed. Potomac avenue station, stadium armory, minunesota avenue shut down. Buss will be replacing orange trains between Eastern Market and schefferly and benning road and Eastern Market. As far as the lines, trains on green, blue and silver lines running every 15 minutes, yellow lines should be on a regular scene ushlg the plan at this point and red line trains will be running every 20 minutes. Have a great weekend. Im storm team4 chief meteorologist doug kammerer. Today is backyard weather day and we are in the backyard of Montgomery County. The Montgomery County fair. So many things to do. So many rides to ride i dont know what im doing, first. Plus that weeke we have an update now on a story news4 broke today. The man accused in the murder of that American University student just walked into the court. Marcus king talked exclusively with our Mark Segraves before he turned himself in. Mark joins us live from outside d. C. Superior court with the new developments in this case. Mark . Reporter thats right. Marcus king just appeared before a judge and a judge did find probable cause to hold him without bond until his First Court Hearing later in september. Now, his attorneys argued that prosecutors and police are unable to determine actually who fired the fatal shot that killed matthew shlonsky, even though marcus king, according to prosecutors confessed to police he was there and did fire a gun, prosecutors called that scene that day urban warfare and an openair gun battle and they acknowledge, at this point, they are not sure who fired the fatal shot. Kings defense attorney said in that case, country charge their client with seconddegree murder. The judge disagreed and said whoever was involved and everyone who was involved in that urban warfare that afternoon in front of the shaw metro, they are all responsible. So far, he is the only one who has been charged. Now, we just spoke with his grandfather, who says they are in deep, deep grief over the loss of matthew shlonsky. They realize this was a bright young man with a Bright Future and feel terrible about his family but still, they are here to defend his grandson, who is now charged in that murder. Coming up at 6 00, you will hear from the grandfather. Reporting live at d. C. Superior court, Mark Segraves, news4. After some storms, heavy rain moved through the area yesterday evening that cleared us up for beautiful weather today, lower humidity, plenty of sunshine. Great news, nice weather continues on into the weekend. It will be hot and a bit humid on monday, but a weak cold front moved through the area monday night, what does that mean, tuesday through friday, low humidity and plenty of sun. Temperatures right now in the low to middle 80s, 82, leesburg, college park, 83 in washington. More on what you can expect this evening, doug will be joining me in a minute at the Montgomery County fair. Lets take a look outside our studios here in northwest washington, just spectacular. See calm winds based on the flag, our front circle. Lows tonight, clear skies in place and dry air, going to dip to around 60 degrees outside of the beltway, so youre going to be out late tonight, early tomorrow morning, keep that in mind, get chilly easy, grab a light jack heet or sweatshirt. By the afternoon, warm up nicely, 67 a low temperature in washington tonight. Heres sky cast four, walking you throughout the day tomorrow. Noticing maybe a little bit of cloud cover around during the morning hours, the most part, a mostly sunny day, by noon, temperatures the low 80s, suburbs in washington. 4 00, temperatures in the mid80s, 86 a High Temperature tomorrow in washington. Tomorrow evening, gorgeous, mainly clear skies, comfortable temperatures once again. Good day to get your car washed this weekend, tomorrow or sunday, looking at a long stretch of dry weather. Humidity forecast this weekend, pleasant, monday, slightly uncomfo uncomfortable, and then as we look to tuesday, those humidity levels drop back down to pleasant. So, if you are heading to the Montgomery County fair, we will get to doug in a little bit, here is what you can expect for this evening, heading out there, or just out and about for town, out and about around the town, maybe having dinner outdoors, 7 00, temperatures around 76, so mild. By 9 00, just a few clouds around, temperatures the low 70s, by 11 p. M. , nice. A temperature of about 68 degrees. So heres your storm team4 fourday forecast, High Temperature, 86, pretty much what we saw today, repeat performance on sunday. Danny, how a category three hurricane, it will likely be impacting areas like puerto rico, bringing some muchneeded rain there. More information about that on nbcwashington. Com. Back here at home, monday, a lot of students have their first day of school. If youre one of those families, i hope you have a wonderful start to the school year. Temperature of 93 a little hot out at recess tuesday. Beautiful recess ccweather, g your lunch outdoors, high on tuesday of 87 degrees, mostly sunny skies, its mild. Wednesday and thursday, look at this 86, not only that but something your app wont tell you, the humidity stays low for wednesday and thursday. On friday, still plenty of sunshine and high of 88, jim. For get the body cameras during the traf