. >> another deadly blast from a planted package 17-year-old draylon mason killed and neighbors horrified i saw ambulance with my neighbor on the structure it was very terrifying for me. >> five and half miles away hours later another bomb critically injuring a 75-year-old woman. herrera. >> heard the explosion. felt the ground. >> police evacuate atded the neighborhood putting small children on busses and alerted everyone not to touch any suspicious packages. >> we have a pattern occurring in this community in the past ten days we believe are related. >> six days later a mile away a fourth bo manying and possibly new tactic, a bomb rigged to a trip wire two unsuspected bicyclists and yesterday the fifth bomb in fedex facility. five bombs exploded but the sixth, unexploded device reco r recovered from fedex turned into a key piece of evidence. police zeroing in on conditt after capturing trying to mail a package. seen wearing an apparent disguise wearing gloves, thez images were matched to his receipt where's police say he kudrowed sued anymore kelly killmore. and nails he bought at home

. >> reporter: and tonight, the youngest victim identified. 17-year-old draylon mason, a dedicated student with a passion for music. the reward for any information leading to an arrest in this case, now up to $65,000. david? >> alex perez tonight. alex, thank you. >>> overseas at this hour, to england, and 24 hours after british prime minister theresa may demanded that russia answer for the nerve agent attack on a former russian spy and his daughter, a new mystery unfolding tonight. another person dead. authorities say russian exile nikolai glushkov was found dead in his home in london. police listing his death as unexplained. counterterrorism officers have taken charge of the investigation as a precaution tonight. >>> back home now, and to tonight's pivotal special election in pennsylvania. the high stakes battle for a congressional seat in a swing state and in a district won by president trump by double digits. the president campaigning for the republican, former vice president joe biden for the democrat. and what this could all mean for november. abc's chief national correspondent tom l

remember, all of this comings after a chaotic month were five bombs were detonated, killing dr draylon mason and andrew house and injuring four others. nbc's c tell us more about exactly what went down last night and how did police and fbi track him down. we have to thank law enforcement officials for their work. >> reporter: it was an army of officials, local and federal, from alcohol, tuberculosit b to firearms. as we go to our second picture over here, you can see not far from me where they've set up a command post. this is the area along i-35 on the northbound lane where the suspect was driving. and apparently was being followed by the authorities. at one point or another, he decided to try to cut off the interstate and go oar to the frontage road but he wound up inside a ditch. officers were there. the car was stuck in the ditch. as the s.w.a.t. team began to approach, they had to wait a little time for the s.w.a.t. team to get there, apparently the 24-year-old suspect inside the vehicle detonated a bomb, killing himself. nonetheless, one of the officers at the scene did fire into the c

today, it is draylon mason.sician who was tragically killed in austin, texas, just this past week, by a package bomb that arrived on his porch. >> he was a member of the austin sound waves. he played the bass and cello. the constructer said when mason played, quote, the light is coming out of him. the energy and the positiveness of him and the desire to be good. mason was a third degree black belt in karate. >> he was set to graduate high school this spring and had been accepted to the butler school of music at the university of texas. he wanted to be a surgery. >> thanks for watching this hour of "velshi & ruhle." >>> right now, time for "andrea mitchell reports." >> right now, revolving door. who is in? who is out? more turmoil as the president appoints a long-time friend and tv commentator to be his top economic adviser and announces it on twitter. >> my immediate reaction was, yes, honored to take the job. i thought he was going to call me because i had some problems with the across the board tariffs, as you

the next bomb went on ten days later in a kitchen at home on east austin killing 17-year-old draylon mason and injuring his monday. and then a package exploded when a 75-year-old woman picked it up. she was critically injured. last night's bombing happened ten miles to the west. the device was left on the side of the road. >> police say last night's explosion may have been set off by a trip wire and it came just hours after officials made a public plea to the bomber. >> we hope this person or persons is watching and will reach out to us before anyone else is injured or anyone else is killed. these events in austin have drawn worldwide attention and we assure you that we are listening. we want to understand what brought you to this point and we want to listen to you. >> jay gray joining us live from austin. and former fbi profile clint van zan zandt. jay, what more do we know about the explosion and how is it different or connected to the others? >> reporter: well, we know it is different in the sense of you how it was detonated. the first three packages were left at doorsteps and apparentl