we have several stories breaking. in the last few minutes, police now have a person of interest in that quadruple murder in northwest washington.

this was a case from just a few days ago where a man, his wife their son, and a housekeeper were all killed in a home in northwest washington and then that house was then burned down. we have new video coming in. we will bring that story to you in a few minutes. first, tonight police have a suspect in custody for the brutal stabbing of a husband and wife in montgomery county. darcy spencer covered this story when it broke what is going on out there now? >> chris, i can tell you i've heard from a couple of neighbors in this community. they feel some sense of relief but also say they're still kind of panicked because it appears this suspect is connected here to the neighborhood. let me show you where we are. we are on ridge ride down the street from the vallardo residence. this is where montgomery county

police are at this hour inside the house conducting searches. police will only tell us this is part of their ongoing investigation into this double homicide. a suspect is in custody in the murders of dick and judy vallardo. we are told there's been no arrests made so at this point new 4 is not naming the suspect they have in custody. the vallardos were found dead on their home at ridge drive last sunday. they did not show up for a mother's day event. family members were expecting them they came here to their house and found them dead. police later said they had been stabbed to death with a knife or sharp instrument and that the suspect had gotten into their home through an unlocked window. their funeral was held yesterday. the police investigation taking place just down the street from

the vallardo residence. police are not telling us a lot about this but they've been out here at this home for some time tonight. montgomery county police are planning a press conference tomorrow where they will release additional details. thanks. stay with news 4 as developments continue to unfold in this double murder. we are staying on top of it on nbcwashington.com and we'll have overnight updates tomorrow morning. right now, we will take you outside for a live look at our city cam. all those strong storms that hit our area have moved out for now. storm team 4 meteorologist chuck bell shows us what's in storm for tomorrow. doesn't sound like we're out of the woods just yet. >> not just yet. we have a couple rain showers late tonight and into tomorrow morning. and tomorrow afternoon things will fire up again. for now, most of the rain light to moderate in nature is south

from prince george's county charles, calvert county. these showers are going southeast bound it will continue to rain across central and southern saint mary's county. nothing too heavy, but if you're outside, you'll need the umbrella for sure. one lone thunderstorm here to thes we of charlottesville, this is going to the east. southern fauquier county fredericksburg and stafford a chance for a few more showers. showers will continue to die out overnight. another likelihood of thunderstorms tomorrow afternoon. that pattern will repeat for the next few days but there are drier days with lower humidity in the seven-day forecast. when the storms swepts in the phones lit up at the montgomery county's emergency communication communication center. two homes were struck by lightning. dispatchers also received calls

that drives were stuck in standing water. we know one man died in a fire in alexandria but there's no word on how it started. the fire broke out early this morning on the third floor of an apartment building on kenmore avenue. one of the residents pounded on the door trying to get the man inside to wake up. firefighters later found that man's body. another resident had burns to his body. it may be weeks before other residents are allowed back in their homes. prince gornleorge's are looking for information about a double homicide on audrey lane. paramedics rushed the victim to the hospital but he did not survive. police looked behind a nearby apartment building and found another man dead with gunshot wounds. new at 11:00, the ntsb is asking the fbi for help as investigator tries to determine what caused the deadly

derailment in philadelphia. specifically they'll be looking at whether a flying object hit the train's engine just before the crash. a commuter train traveling through the same area reported it had been hit by rocks or bullets. >> the question for me is whether whatever happened was enough to distract the operator of the train to cause him to lose situational awareness and to not brake and not slow down when he should have. >> today the federal railroad administration ordered amtrak to install automatic train controls along the route there's a don't have them. the curve in philadelphia did not have the safety device. we see protests all the time in d.c. but nothing quite like this. today hundreds of people in sail boats, kayaks and canoes took over puget sound for the paddle in seattle to protest shell oil's new oil rig, they banged

their paddles, oars and yelled shell no. shell is set to drill in the arctic ocean which the company says holds 13% of undiscovered oil. the man who landed his gyro copter outside the u.s. capitol is saying why he did it. doug hughes has been under house arrest in florida. he is due back in d.c. this week when he will go to court in the criminal charges. hughes wrote an op-ed in the "washington post" saying he didn't want to cause damage or hurt anyone. he said he wanted to call the way big anonymous donations influence elections. part of what he reads is we want to live in a 21st century democracy where reknow who is influencing our government. police have a person of custody in the death of a couple in rockville. we'll bring you any new developments as they come in. and a fairfax rescue team

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they went to nepal to help earthquake victims and tonight 57 members of virginia task force one are back home. it was an emotional homecoming. the men and women and urban rescue dogs saved lives and helped to rebuild nepal.

they got there shortly after the first quake hit three weeks ago, and lieutenant rodney vaughn told us he was struck by the resilientcy of the people. >> the one thing that stands out is the resilience of the population. they had a whole lot of destruction. you could see -- there's a lot of fear, but they were very hearty trying to get their feet back underneath them. >> more than 8,000 people have died in those earthquakes. here at home parking rates in arlington county are going up. starting in september, street parking will cost $1.25 an hour. that's a 25 cent increase. arlington says their parking rates lag behind those in the district arlington and bethesda. we're following a lot of breaking news. police identified a person of interest after four people were found dead in a northwest d.c. home. we'll have that story in moments. and next on new 4 at 11:00,

after strong storms today, could we see a rainy repeat? chuck hat timing on possible wet weather. and millions of people in the heartland are bracing for their own batch of severe weather. some of them are still picking up the pieces from the last okay, i need a better pizza. one made with only real cheese. a pizza my family will love. (announcer) freschetta naturally rising crust pizza. freschetta.

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the northern panhandle of texas was getting pelted by big pieces of hail today. when the hail hit the ground it started mixing with the two inches of rain that fell over the past 24 hours. it's not over yet. now the area is facing a tornado

threat. nbc's john yang has more on the severe weather. >> overnight flashes of lightning in southwest nebraska as torrential rain and hail pummelled the area. tornados were reported in colorado. >> that's a tornado right there. >> reporter: in wyoming where this mobile home was destroyed. a tornado also struck down in south texas, part of that state experiencing heavy rain cha flooded swimming polls. there was a massive sinkhole in granbury. heavy rains are blamed for opening up this sinkhole which has grown to more than 40 feet wide and more than 40 feet deep. with more heavy rain forecast for tonight, officials fear it could grow bigger.

>> crews are racing the clock. >> it's unusual for us. we don't have those kinds of disasters. to have this much rain is really out of the ordinary. >> reporter: rain has been affecting lake levels. more than ten inches at lake ray roberts in two weeks. >> if you were standing anywhere in that basin you would be standing in about ten inches of water that runs off, we capture that in this reservoir. >> reporter: the floodgates are open to alleviate the pressure as residents are warned of possible evacuations. >> without this project you would have had serious flooding. >> reporter: tonight, from texas to the plains millions are bracing for more severe weather. john yang nbc news granbury texas. >> you look at that you realize we got off good. >> yeah. just a couple of isolated severe thunderstorm warnings. no widespread reports of damage. we will be under the gun tomorrow afternoon with the heating of the day and humidity. thunderstorm chances right back

on us by tomorrow afternoon. that pattern will continue into monday and tuesday as well. all indications are, to me any way. outside for now it's a mild saturday night. cloudy skies, still rain showers, primarily south of the d.c. metro area. 27 in washington. dew points, which is the way it feels outside from a humidity standpoint. any time that number gets above 60 you feel it when we get close to 70 it feels more like july and august as opposed to may and june. 67 our dew point now. temperatures around the region are mostly in the rain-cooled upper 60s and low 70s, courtesy of the late afternoon showers and thunderstorms. for now most of the rain is confined south of the metro area going south into parts of southern maryland southern charles county along 301, south of laplata the rain is coming to an end grad limit one or two

lone thunderstorms in the shenandoah valley. the pattern favors a repeat performance tomorrow. all that moisture and rain showers out there will be sitting out over us tomorrow. you add that daytime heating back into the mix. like today, one or two could be strong to severe. there's a severe weather out across the plains states. they're under the gun for the next couple days. tonight, temperatures will hold in the upper 60s to near 70 mild and dry morning. back into the 80s with another likelihood of showers and thunderstorms tomorrow. noon to 5:00 out to the northwest. 5:00 to 10:00 for the timing of the rain drops down south of town. future weather continues to show those rain chances through the course of the afternoon. seven-day forecast for you now. it's going to be warm and humid, kind of stormy around here the next couple of answer. temperatures into the 80s. after tuesday night, we dry it out, cool it down take the humidity away. highs in the 70s, lows back down

to the 50s. we're following breaking news. d.c. place have now seen a person of interest in connection to a quadruple homicide on thursday. they need help to find this person. this is surveillance video of someone driving a porsche sports car that had been stolen from the murder scene. a couple their 10-year-old son and their housekeeper were killed. then the house on wood lawn drive was set on fire. anyone who saw this person or the blue 2008 porsche 911 sports car is asked to call d.c. police. jason i (gong) blend kikkoman

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i grew up a lions fan. we were some of the biggest losers in the nfl. we used to say draft day is like our super bowl. >> draft day, rookie mini camps. let's hope this year is different for the redskins. i have a feeling that might be the case. the future of the redskins organization took the field this weekend in ashburn. brandon scheriff and brandon jones adapting quickly to life in the nfl.

>> rookies reporting. reenergizes the redskins. >> repeat every play. >> it's exciting to see. they have worked extremely hard. they studied. they go out there and they practice with great urgency and tempo. >> it's a dream come true to be here. this is something i was thinking about and dream being since i was little. it kind of feels unreal. >> reporter: the biggest attraction first round draft pick brandon sheriff. >> every since we ended the season we were ready to play football again that january to may layoff killed me. putting the helmet on again feels good. >> reporter: the rookie that impressed jay gruden wide receiver jamison crowder. >> i'm trying to come in learn, pick up what i can. just see how it translates when the season comes. >> reporter: if you're curious about the quarterback spot there are two guys trying out for that

position. run of them has never even thrown a pass in a college game. so i don't think robert griffin iii has anything to worry about. >> last day of rookie mini camp for the redskins tomorrow. practice is closed to the public. let's talk baseball now for a moment injury updates for a couple of nationals player. doug fister placed on the 15-day disabled list due to a flexor strain. jason worth will sit out again tomorrow. matt scherzer had it going tonight in san diego. not much rain in san diego. so the grounds crew they just kind of danced to pass the time. i like those guys. the nats offense had plenty to dance about tonight. top of the first, escobar up with the man on. escobar delivers. that's ian desmond coming around to score. the throw way off the mark. escobar heads to second on the error. 13th rbi for escobar this

season. nats up 1-0. this man here has been hot, the catcher, wilson ramos at the dish here. he's coming through once again. bryce harper coming around to score. ramos has an 18-game hitting streak. that's tops in the majors. nats are up 3-0. matt scherzer was dealing. men on the corners, no problem for scherzer tonight. he had 11 strikeouts and a 11 shutout innings. right now the nats are on top in the ninth inning 4-06789 up to baltimore, a 57-minute rain delay to start this game. angels visiting the orioles. bottom of the fourth scoreless. steve pierce at the dish. he gets ahold of this ball a towering shot to left. his third home run of the season. the birds, they go up the one. top of the seventh, men on the corners for mark crux. he slices this one into left.

one run scores easily. rbi single. angels up 2-1. mike trout decides he wants in on the party. trout goes opposite field. ten home runs this season for trout. the angels beat the birds, final score 6-1. over on the track, it was a wet one at pimlico. grandstands and infield cleared out because of weather today. the 140th preakness stakes did get underway. out of the gates, american pharoah along the rail. he was the heavy favorite coming in. despite the mud and rain shoots out to the front of the pack. trainer bob baffert hoping to complete the second leg of the triple crown. american pharoah winning by seven lengths. tale of verve and divining rod finished behind american pharoah. the third time in four years that a horse that a chance at the triple crown. to the ice, the capitals season is over. alex ovechkin playing for russia

in the world championships facing the united states today. russia on top by a goal in the third period. usa turn the puck over. ovi gets ahold of it. makes a nice few moves and will put that one home. first game first goal of the world championships. russia beat the united states the final score 4-0. >> thanks. we're following a few breaking news stories. we have the double murder out in rockville that we're following

what a perfect day for a picnic. it's so nice out here. chrmz chrpz