plus, no interest until january 2021. ends wednesday.

right now oon "news4 this week," wiring problems, big issues for metro's newest rail cars.gi we are digng deeper to see how long it will take to fix the issue and how it will impact your ride. the s homes to be demolished. now a family is fighting back, saying they are being treated unfairly. war on drugs. we go inside a grassts r campaign aimed at stopping drug overdoses and saving ves. announcer: welcome to "news4 this week." everyone. i'm leon harris. all the 7000 rail cars need to be rewired. the transit agency paid nearly $1.5 billion for the trains.

our partners first reported thi problem. mark segraves, working for you, digging intohe latest issue for metro. >> reporter: while this new wiringroblem with the 7000 series is not a safety concern, metro acknowledge it could cause unreliability. since they first hit the tracks back in 2015, the 7000 series rail cars been touted as a itical part of metro's promise o improve safety and reliability. this internal report fm the department of insurance found every one of the new cars has a wiriblem that has to be fixed. it cited wire crimping defects that went undetect by the manufacture that could cause lengthy delays and poor reliability. all 548 cars have the defect. it is i estimatedt will take one year to fixhem all. the report also found 200 of the

7000 series cars have an additional problem. that work is soime consuming, the entire staff at this rail yard isic ded to working on it. i that works estimated to take o years to complete. riders we spoke with took the latest problems with the transit system in stride. >> another problem amo many that metro seems to be having. we need all the jurisdictions to step up and fund metro like they were supposed to. >> reporter: they are working with the manufacture tod inspec repair the problems. the 7000 series rail cars , rema by far, the most reliable cars in the fleet. inspections will be performed at no additional cost to metro a no impact on service. in the district, mark segraves, news 4. if the government wants your property, even your home, they can take it in something called

eminent domain. it is causing people along i-66 home. as virginia plans to improve the interstate, we spoke with homeowners who feel like their voices areeing muffled. >> when we spent hours commuting like this,ou understand why his short walk is appealing. >> across the street is the metro il, which take to work every day. >> we followed him to the met station, four minutes. >> we need to be moved to an equivalent home. >> reporter: his wife, sue, is depending on it, too. >> tomorrow's i-66 will serve more people. >> reporter: the delegat says there are benefits to a wide road. >> v-dot and contractors are nickel and diming my

fair tuents over the market price home they are chasing. >> this home is f slated demolition as well. he's lived her 47 years and v-dot wants her out by the end of the year. >> it puts us in limbo. we don't know what's happening. >> reporter: her daughte traveling in from texas to help her mother. >> she is elderly, about to undergo knee surgeryshe's been putting off. they areer: v-dot says working individually with each of the impacted propertyow r, adding the properties go through a fair market appraisal and they work to find comparabl homes for the residents. the folks who live here know they cannot save their houses. they are hoping with the helpf v-dot they can find an equally convenient place to find a home. a grass roots campaign on the streets of.c. aims to try to save lives, coming after a

spike in ovdoses involving synthetic drugs with k-2. we have the effort under way to bring awareness after hundreds of pple wer left in the hospital last month alone. >> reporter: people w witness the stable outbreak say it was sofy horrig, they had to do mething, anything, to keep it from happening again. inside the clinic area on northeast d.c. that helps workers, it was like anrmy battlefield hospital three weeks ago, when clients start overdosing, one after another after another. we had 15 overdoses withi two days. they managed to save them, thanks to having the drug. nd reporter: news 4 was there as d.c. fire crews tended to people who overdosed on a possibly fatal batch of dgs called k2 or synthetic marijuana

even though the chemical component is diffent. >> two people have died from k2 overdoses. >> reporter: the director of central mison near union station. he was so alarmed by the deadlyb oureak going on he and his staff organized a town hall meeting to discuss the matter with residents. >> k2 is the latest thing kicking people while they are down. it t ising advantage of people in their poverty to get a cheap high, bute process, it is killing people. >> reporter: d.c. officials say 300 people were treated at hoitals for erdoses during a ten-day period in july. more than all of jul in 2017. in northwest, jackie bensen, news 4.he n we come back, the srt list getting shorter. amazon coming closer to picking a city for its new headquarters. a d.c.re still in the running. convenient and quick.

how saf are payment apps? susan w hoganh what you need to know about the security of the services. there are

there are ports amazon is getting down to the finalists for their he aquarters. th looking at 20 citying cluding d.c., northern montgomery and virginia. cey will the list this month, then ask for the best a fina offers. the new headquarters will creat0 50,0 jobs and $5 billion cons.uction investme the company is not saying a word about its plans. loudoun county drivers along busy route 7. the change east of leesrg is w open. it puts the county closer to making route 7 a limited access highway. we'llee construction in the

area for several weeks as crews wide road. this project includes bike and pggerhs at a bridge over at the "w" and o.d. trail. one d of thekest days. what we are learning about the capital gazette shooting suspect and how to prevent it. paying with a tap of your phe has never bee easier, but is it safe? susan hogan is working for you, looking at the best online payment systems.

>> > it was one of our areas darkest days at the annapolis community continues to heal, the police chief is looking back at what authorities believe led to the capital gazette shooting and making chaes within the department. >> if we don't try to get etter, we are not doing our job. >> the news 4 i team did an

investigation. jod d jody looks at what action they are taking now. >> responding to the active shooter. >> at least tenhots heard. >> it floored me. this can't be happening. >> reporter: the police chief ew it could happen in his communit what he didn't know was how many people were afraid this man might do it. >> suspect in custody. >> reporter: jared ramur charged withring five newspaper employees inside the capit gazette. they documented why a detective did n believe mr. ramos was a threat to employees there. >> i trusted and still trust his judgment, you know? >> reporter: the newspaper called police to investigate the

messages in his twitter feed, but decided not toue per charges. he had not tried to enter or sent direct corresponding comments. >> the people they interviewed that knew him, wheer it be parents, friends, family, neighbors. >> reporter: he used to run the threat assessment center for the secret service and notes the outline reports the steps the detectives did take, but doesn't mention such interviews. finding a trustn source wit the suspects circle is critical. >> look at the targeted violence cases, rarely do they make a threat. >> reporter: they almost always exhibit signs. he says it's unfair and dangerous to ask law enforcement to predict futureehior without extensive training. >> they can't go it alone. they have to have the full

cooperation of the system. >> reporter: ramos may not have been a threat when the newspaper called. >> the thing to keep in mind, you can close a case,ut it needs to be monitored. >> reporter: monitoring the latest tweets are textbook preattack behaviors, like a half dozen to the charlie hesbo newspaper. is that a red flag? >> ablutely. >> reporter: do most average police departments know this? >> unfortunately, no. >> reporter: he says that's something 's going change. >> we are going to hire an employee this year to do nothing mu monitor maybes on social media. >> reporter: he decided to create tt positio after the school shooting in parkland, florida, in february.

his department gets at least one threat call a day, 183 during th school year last year, most involve social oumedia. >> i like to see a strengthening of the statute. for us to get a criminal charge, the threat has to be extremely graphic,pointed, narrow, i'm going to come kill you. >> reporter: the departments thorough review will include the threats. >> you will see us s tweet to officers need to clap eyes on somebody. >> he e plans to approach his fellow police chief about legislation to give more latitude whe investigating threats. >> i have to be honest, i'm ustrated every day by what we can't do. we can't guarantee anyone's safety in this world. i wish i could. but, tell us, we'll move heaven and earth to help you.

>>there's no record, by the way, of the newspaper following up wit, poli even though the tweets continued for several years. the i-team also looked into why some think the laws have to change when it comes to online threats. to learn more, check out the nbc washington app and click on investigations. millions of amecans are paying each other without actual cash changing hands. that's been done through er o-peer payment services. are they secure? do they protect your privacy? susan hogan is working for you u and what need to know about the services. >> reporter: it's a convenience that is growing in popularity. an estimated 79 million americans will use a mobile peer-to-peer payment service. >> it's easy to split a check a the table. >> it's easier to do that. > reporter:s messa and

emojis. with consumers worried about data breaches and hacks, can they be trusted. five were rated focusing on security. >> we didn't find they are so bad you shouldn't usethem. >> reporter: apple pay, for instance, was the only oneo score top marks for data privacy. >> they try to te the least amount of data and keep the least amount of data to keep your privacy protecteor >> repter: however, it's only available if both the sender and receiver use an apple smartphone, watch or tablet. that's something to note wit peer-to-peer in general. >> i have to have it, you have to hav it. >> reporter: depending on which service you use,re accounts linked to your bank account, credit orebit cardnd papal. opt for the highest privacy and security settings possible on the apps adding, for instance,

a p.i.n. orge frint authorizati authorizatio >> only pay people you know. >> mak sure t keep the app up to date. hackers are always trying to find new as a rule nerkt. use the most recent version available and beareful. libraries in the area have been closed because of budget cuts, remodelling and fires. the recent behind a recent shutdown in our area? it's more surprising. when we come back, we'll show how snakes, yes snakes, ended up in the stacks.

a d.c. public library had to close its doors when uninvited guests showed up. they dn't have legs or shoulders, they slithered their

way through. we have the story that might make yourkin crawl. >> reporter: if you go to the d.c. public library in georgetown and curled up with good book isn't who or what, i should say, you might think. snakes. over the weekend, several guarder snake were found in the library basement. >> i mean, i would just wet my pants. i just wouldn't -- >>reporter: here is the type of snake we are talking about. they are not the aual ones found in the library, they are guarder snakes. they were found here in the meeting room, steps away from the children's section. i' told four snakes were found, three alive and one dead. >> i think they are terrific. >> reporter: whyo many and why did they get in? >> i'm not a meteorologist or snake expert, fwou get out of the rain. >> i think with the whacky

weather and flooding, they are looking for a cool, dry they are harmless. they are good for the environment. they are heatinghings we don't like. they are okay. >> reporter: the library closed a few days for bestcontrol, but is once again open for all kind of readers, minus the ones that slither. >> reiterate what he is saying, theotnakes are dangerous. they want to be put back in the wild and left alone. hopefully they won't deterom yo wanting to read. that's all for "news4 this week." i'm leon harris,'m going to leave you with video of redskins training camp. the real ges will be starting before you know it. thanks for joining us and have a great week. ♪ ♪

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