This morning the fbi is joining Prince Georges County police in trying to solve the murder of a 3yearold girl. Theyre nearly doubling the reward to find the man. Tracee wilkins joins us live in landover, maryland, with more on the new effort. Tracee, good morning. Reporter good morning, barbara. Now that the fbi is involved, the reward has increased from 25,000 to 45,000, and it has also expanded the search area as they look for devon wallace. Now, the billboards will be strategically placed. These are the areas police and the fbi believe wallace may be to avoid being locked up. On august 10th, the 3yearold was shot and killed while playing in the home of a relative in landover. Police believe wallace shot the outside of that home in retaliation after an argument he had with someone else inside. While police were able to arrest and charge a friend who they say gave wallace the gun and helped him leave the scene, wallace is still on the loose. We now have a federal arrest warrant for davon wallace. Wallace is wanted to unlawful flight to avoid prosecution in the murder of 3yearold kanij acha bib. This allows the fbi to do everything we can to help the Prince Georges CountyPolice Department in this effort. We also want to let the public know that were offering 20,000 for anyone who has information that leads to the arrest of wallace. Reporter now, the chief said that he has never had a case where its this difficult to find their suspect. He is convinced that wallace is getting help and that someone is helping him to avoid arrest. Hes saying that whoever is doing that, theyre looking at federal charges for aiding and abetting, very serious charges with longterm penalties. Reporting live in landover, im tracee wilkins, news 4. Thank you, tracee. And right now you should not try to drive northbound on rock creek parkway, heres why. Take a look. This tractortrailer got stuck trying to drive under the freeway. The road is closed there and police are calling the issue an extended event. Were not sure exactly when the road will reopen. You can use k street or pennsylvania avenue to get to the parkway instead. And were learning this house fire that killed an elderly woman in rockville may not have been an accident. In about two hours the womans son will be in court. He is accused of killing his mother and setting her house on fire. The incident still has neighbors talking. Megan mcgrath joins us live on irish street with reaction. Megan. Reporter well, barbara, yesterday neighbors had sympathy for hanni halen. He lost his mother in an Early Morning fire that he himself had to escape the smoke and the flame. Late last night came word that things were not as they seemed. At first it seemed like a tragic accident. An elderly woman overcome by smoke in her bedroom. Her adult son able to escape. But late last night, Police Charged the son, 57yearold hani haleem with firstdegree murder. Police say he stabbed his mother to death and then set the house on fire. Police say he confessed to the crime. Its really shocking. Its really shocking. I was feeling sympathy for him and his family, but i hope he goes to jail forever. Lovely family. Its just awful. I had no idea. Reporter this morning investigators returned to the home on iris street to gather evidence. The house now boarded up is a crime scene. A neighbor saw haleem in front of the burning house. He figured he was upset about the fire and his mother who was trapped inside. He was shirtless, just running from the house. Reporter nothing seemed unusual . Exactly. I felt really bad for him because i know his mom is there. Reporter as he faces his first court appearance, neighbors continue to grapple with the bizarre turn of events. Dying in a fire, i thought it was pretty bad. But now knowing that her son was the one who killed her, thats really shocking. Reporter and theres been quite a bit of activity here at the house. Investigators are expected to be here collecting evidence for most of the day and perhaps even into saturday. Now, as for haleem, he is Police Custody and is due in court later today at 1 00. Megan mcgrath, news 4. Barbara, back to you. Right now Mark Segraves is at d. C. Superior court where mayor vincent grays former driver is expected to plead guilty to conspiracy. Prosecutors say mark long drove gray to multiple secret meetings during grays campaign in 2010. Hes also accused of illegally picking up cash in his car. Mayor gray has not been charged with anything. Were expecting to learn more from Court Documents today. Follow mark on twitter to learn more on the plea as soon as it happens. And turning to the weather now, sunny skies on a steamy friday morning out there. Storm team 4 meteorologist tom kierein joins us with his first midday forecast for this friday. Tom. There is a live view from the storm team 4 city camera. We have been in the run of days here over the last several days where its been really pretty much the hottest run of weather weve had so far this summer here in early september. There is another view of our sky, live view from the storm team 4 tower camera looking toward the west. There is summer heat and humidity on this september 5th. Now 83 at reagan national. Dew point is a steamy 72. Humidity at 70 almost and the wind coming from the south is continuing to bring in the humidity. Its going to be with us here. Now, temperatures to our west are hovering in the low 80s. Loudoun county, Prince William and fauquier county. Fairfax county and montgomery and prince georges now low 80s. Low 80s right around the Chesapeake Bay as well. Not much really out in the mountains. Many locations, Shenandoah Valley out there are in the low to mid80s. Martinsburg 85 degrees already. A look at when were going to finally get a break from this heat and humidity in just a few minutes, barbara. Thank you, tom. New reaction this morning from Close Friends of bob and maureen mcdonnell. Many are still in shock over the couples conviction in their corruption trial. Everybody is devastated. Theyre in disbelief. Reporter our affiliate in richmond was at the mcdonnells home after the verdict came down. A friend of the family, who only wanted to be identified as terry, says the mcdonnells are good people and the jury got it wrong. Hes a good man and bob will rise again. I have friends who are attorneys, judges, and they have all said to me bob must have done something to upset someone in the federal government, because this jury would be hard pressed to find any corruption. Reporter terry also says she believes the former governor was willing to open up about his troubled marriage only because he thought it would prove his innocence. The jury clearly felt that prosecutors made the stronger case. The former governor was convicted on 11 of 13 counts, including corruption and bribery charged. His wife, maureen, was found guilty on nine of 13 counts. This all stems from the acceptance of gifts for political favors. Back in december, the couple could have avoided jail time if Bob Mcdonnell had pleaded guilty to just one count of bank fraud. And were getting new reaction from the jurors who handed down those convictions. One spoke to the washington post. She told the post, quote, it was a tough decision but it was not a hard decision. She then said, quote, it was tough to see his family go through that, but when it came down to brass tacks, we knew the decision we had to make, close quote. The sentencing phase now begins. Its scheduled for january 6th of next year. The mcdonnells could face decades in prison but many experts do not believe they will get the full sentence. Theres so much to this verdict, we have put a lot of the analysis on our website. The news 4 iteam has a recap of the bombshells that may have won the case for the prosecution on nbcwashington. Com. And right now shes being remembered for her rapidfire jokes and edgy humor. Coming up, how people are honoring the life and death of joan rivers. Plus, back in the United States, the latest american doctor to contract ebola in west africa. How his case is now being treated. St right now joan rivers family is finalizing arrangements for her funeral this sunday. Rip joan rivers has been trending on twitter going on 22 hours now. Joan rivers said she would never retire. She passed away at 81 years old. According to the hollywood reporter, sales of her books are now skyrocketing. One of the sales up an amazing 70,000 . Lots of comedians and celebrities gave heartfelt statements remembering rivers including her Fashion Police cohost kelly osborn. Jimmy fallon also gave rivers a special tribute. We had her on our very first tonight show when i took over. Im lucky to say that i got to work with her and have our on our tonight show. I was just so blessed to do that. She came out and she came over to me and she started crying, she gave me a kiss. It was really emotional. And really nice. Theres the moment now jimmy mentioned right there where rivers gives him a kiss. This was the first time she had appeared on the tonight show in more than 20 years. She was one of a parade of stars to pay up on a socalled bet that fallon would never get to be the host of tonight. Right now we are waiting to hear from president obama. Hes expected to hold a News Conference from wales. Well bring you that live coverage. Tom, tell us what the weather will be today. It is hot and humid and we have hazy skies around the region right now. Temperatures are already climbing into the 80s. A look at when were going to get a break from this heat and humidity. Thats coming over the weekend. Ill have that for you coming up in just a couple of minutes. St a third ebola infected american has made it safely to the u. S. To begin treatment. Dr. Rick sacras plane landed this morning and he was transported by ambulance to the Nebraska Medical Center in omaha. Its one of a few facilities in this country with equipment and trained staff to treat diseases like ebola. Sacra has been in isolation in liberia since falling ill. He will not receive that experimental drug, though, that was given to the other two americans who are now cured because supplies of that drug have run out. Right now ukraine leaders and prorussian rebels say they have signed a ceasefire deal. The deal takes effect at 11 00. This comes after World Leaders at the nato summit agreed to create a Rapid Response force to address the threat of aggression from russia. The force will include several thousand land troops ready to deploy within just a few days. Congress intends to get more information on the obaadministr against isis. Secretary of state john kerry will testify at a hearing of the House Foreign AffairsCommittee Later this month. President obama has been catching criticism for a week after stating that his administration didnt have a strategy yet for dealing with isis in syria. The white house says the u. S. Would not rule out boots on the ground in syria in an effort to cripple or destroy the group. And were going to hear more from the president in just a few minutes. Hes expected to hold a News Conference in wales at 11 30 this morning. You can also watch an exclusive interview on meet the press with chuck todd this sunday morning at 10 30 right after news 4 today. For more on that News Conference, we are joined by mark murray, nbcs senior political editor. Good morning, mark. Good morning, barbara. So what do you expect the president to have to say from wales this morning . Hes got a lot to say. Obviously the news has come out of ukraine on this ceasefire. He believes thats going to occur, whats going on there, and of course dealing with the strategy against isis in syria. Its important to know it was just a week ago in which obama did say i dont have a strategy yet in syria when it comes to isis and that is true. One of the challenges this administration has been having is putting together a strategy that is very complex. It continues to change, this threat from isis is a very real threat but it also is something thats not easy to solve. So how do you kind of solve it in a world in which youre in a society that is demanding immediate actions and immediate answers. So the administration is continuing to try to figure its way out of there. Theyre being very deliberate, oftentimes the deliberation and caution is a wise strategy. The administration is getting a lot of flak for not having an immediate answer. The president is having problems here at job. The jobs numbers that came out, 142,000 jobs created in august, the Unemployment Rate stopping at 6. 1 . Yeah, 142,000 is as much as weve seen in past months where the numbers have been over 200,000 but to say that 142,000 is disappointing, it shows you how far weve come from a couple years ago, if not four or five years ago, when nearly 150,000. Everybody says, oh, man, thats kind of disappointing. Overall when you look at the average over the last six or seven months, its been pretty good and actually at a stronger pace than its been in the last five or six years. I want to change subjects a bit here. Bob mcdonnell verdict, what was the most surprising thing that you think came out of that. As a political reporter and someone who covered his gubernatorial win and covered him being a potential Vice President ial candidate and somebody who was in the mix to run in 2016, i have to say just a stunning fall from grace. You cover virginia politics, you just know how big of a star he was. Even when the scandal occurred, his Approval Rating still around 55 , he was very popular. Just a huge fall from grace. Just kind of a reminder about politics, it can change so quickly. And this serves notice on other politicians out there, i suppose. All right, have a great weekend. See you next week. For more from mark and the rest of the nbc news political team, check out first read on nbcnews. Com. Getting around the district could be tough this weekend. Coming up, the road closures you will want to know about. Plus, the medical breakthrough that could be critical for children born with birth defects or people who have been in a terrible accident. First, heres a look at whats hot on nbcwashington. Com. Tradingin or selling your car, truck or suv . Webuyanycar. Com takes the hassle out of selling in just 3 easy steps. One, get your free online valuation. Two, book an appointment. And three, pick up a check at your nearest buying center. Find out how much your car is worth at webuyanycar. Com you can run, ride and swim in the nations triathlon in d. C. This sunday. However, dont try driving near the mall. The 14th street bridge as well as parts of rock creek parkway, independence avenue and ohio drive are going to be shut down. The triathlon will begin at 7 00 on sunday morning. Take a look at this, our video from last year. You can run a shorter course this year if youre not interested in the full one. Registration is open through the start of the event. And now to what could be a Major Medical breakthrough. For the first time doctors are able to turn stem cells from body fat into living cartilage. What does that mean . Well, it means doctors are able to grow ears and noses in a lab and maybe more. Dr. Steven hopping is here this morning to talk about what this means for children born with birth defects and people who have had some traumatic injuries and maybe even other things. Explain how this works. Well, this is, again, another revolutionary breakthrough that were seeing, another great advance in Plastic Surgery coming out of london this time. So what they are doing now is for children who have micotia, born without one ear, they are taking stem cells. Where are they getting it from . The fast of the abdomen. Its easy to harvest the fast. What do they use as a a model. Thats a very good question. Computer generated biofilm that is just exactly like the patients other ear, okay. Then they implant the stem cells. The stem cells grow on this template in the laboratory. Then they are transferred they transfer it to the side of the childs ear. The template dissolves and youre left with this cartilage mold of an exact replica of the childs ear. Has this actually been done now or is this hypothetical . No, theyre actually doing it. Theyre growing it in the lab. Theyre able to do that. Now how many times they have actually implanted this in children successfully, i think they have just started to do this now. What have they done for deformities like this in the past . Well, there are procedures that plastic surgeons can do, but they involve risks and other scars. You have to take a rib, sometimes a few ribs to create a mold. And again, this tends to be not an exact replica. Or you can do a plastic ear. Heres some examples of the traditional things. So were able to improve this, but it requires multiple surgeries. This will make it a onestage procedure using the stem cell 340e mold and achieve a better result. Thats great news. How about using this cartilage for other things, like cartilage that gets that you lose from running in your hip or your knee. Do you think that there will be something sure, i think there are going to be great applications for this for adults, for joints. Theyre already injecting patients stem cells into joints to try to help regenerate cartilage. All this is possible. Bones, bones that have been lost from cancer, from trauma, they can create bones. And again, these are the importanthing is these are the patients own tissues so you dont have to worry about the body rejecting them as you might artificial tissues. Well, thats good news. Keep us informed. We love to know whats coming. Its really exciting and the future is is now. It is now. Well put, barbara. Thanks so much, dr. Hopping. And right now hundreds of people are getting some lifechanging help. Coming up, the free dental help being done today. Plus, its hot and humid again today, but big changes are coming for the weekend. Storm team 4 meteorologist tom kierein will be back with a look ahead. And an art project gone wrong. The trouble a woman got into for this cardboard license plate. W right now espn crews are converging on a school in our area. Centreville is a public school, gonzaga a private school. Students have spent the week making bann