for marie gemmel and her two children inside, there is no escape. her husband and another child were not home and survive. today ken gemmel says it is good to know once and for all why the plane crashed. >> i just wanted to thank the ntsb board for their diligent board and the great research they did today. brad: gemmel in the audience today as the ntsb formally adopts the result of the year and a half investigation into the december 2014 crash. the blame placed squarely on deceased pilot dr. michael rosenberg. not reacting to a buildup of ice on the wings of his plane. >> we had a pilot that did not turn on the deice system. we don't know why he didn't turn on the deice system but he didn't. we could also throw in the mix the speed. he was 34 knots below what he should have been. brad: now the ntsb says it was the pilot's there are technological changes that could be made in the cockpits of the planes that could prevent accidents like this. we will tell you about that when we come back at 5:00. in gaithersburg, brad bell, abc7 news. alison: brad, w

marie gemmell and her two young sons ages three and two months old were at home when the plane crashed setting the home on fire and damaging two other nearby homes.mes. kenneth gem be and the couple's five-year old daughter were note home at the time. the three men aboard men aboard the plain also died in the crash. pilot did not perform thethe required checks before leaving north carolina and he did not use the deicing system during sy the flight. by not taking possible icing ic into consideration, the pilot pi ended uplanding at speeds that were too slow for those weather conditions. the plane crashed less than a mile present the runway. here is what the chairman of the ntsb had to say during a publicb meeting about that crash today. their calculations must be as precise as possible and they th must follow required procedures applicable to their aircraft. pilots cannot skip a checklisthk or cut a than coulder even once because any flight can turn deadly. time and again that we have h whether in a commercial airline error in a private airplane the cockpit is no place for come for plac

on the ground, marie gemmell and her two young sons also died in the house as she tried to shield them from the smoke and the t flames. > the president of george washington university said he'll step down next year. he said he will not seek a new contract when his contract expires. by then he will have spent ten years as president of the university. also new at 11, a bank robbery in montgomery county did not go quite as planned. take a look. this guy who was wearing a fake beard teller, as he's standing there, the fake beard slipped off revealing his face to the teller. it happened on the shaky book bank in rockville on thursday. if you recognize this call, call police. he need the money for a better quality beard.qu > still to come, donald trump under fire, bernie sanders refusing to call it quits. we're breaking down tonight's developments on the campaignpaig trail. also ahead tonight, a smart home for a hero, a wounded warrior takes a look around the highthe tech house that is specialty designed for him and his family > you're going to love this story because guess what we aren't go

and fueling fuel into a neighboring home, trapping a mother and her two young sons inside and marie gemmelld trying to protect cole and 2 month old devin. they were overcome by smoke. >> its team of investigators and determined the probable cause of the jet crash. >> the national transportation safety board determines that the probable cause of this accident was the pilot's conduct of an approach in structural icing conditions without turning on the airplane's wing and horizontal stabilizer deice system. >> reporter: the ntsb recommends training for pilots to recognize icing. this jet, the phantom 1000 had no ice-detecting system to warn the pilot. >> because pilots are human and there are are therefore fallible, this crash is a reminder that automated alerts and ntsb hearing with his lawyer. >> i wanted to thank the ntsb board for their diligent work and the great research they did today. this is a good first step. it was good to know that this accident was preventable and hopefully down the road this will never happen again with their work today. >> at the time of the jet crash, questions

. >> sending the plane crashing in the gemmel family home killing marie and her young sons devin and cole. her husband ken is in the audience today as the ntsb finalizes the crash report and recommend the small jets be equipped with an ice warning system. >> it's a good first step. good to know that the accident was reventable and hopefully down the road it won't happen again. >> gemmel now raising his daughter alone thankfuller the generous donations to a go fund me drive for him and his daughter with survivor with one of the passengers in the plane he is suing the pilot estate and the builder of the jet. >> the pain never goes away. hopefully what the board just did will help prevent a crash like this from occurring again. >> now, back to this model to explain what the ntsb w essentially when ice gets on the wings of an airplane it changes the flight characteristics. the pilot in the cockpit can't see that. so what the ntsb is asking that manufacturers of small jets like this put in a warning system so the pilot gets an alert, can flip the switch. to deice the aircraft and avoid an

gemmell has filed a lawsuit against the plane's manufacturer and owner on behalf of his wife marie who to save the lives of her 3-year-old son cole and 2-month-old devin. >> i just wanted to thank the ntsb board for their diligent work and the great research they did today. this was a good first step. it was good to know that this accident was preventable and hopefully down the road this will never happen again. >> the phenom 100 had no warn the pilot. the ntsb is recommending training to help pilots recognize icing dangers and take immediate action. chris gordon, news 4. >> our own angie goff sat down with ted gemmell and talked about how he's healing and working to build a life for his daughter and hear their emotional story on the nbc washington app. search gemmell. >>> a couple accused of illegally flipping homes in the district and now they'll have to pay more than $1 million to the homeowners who bought them. today the d.c. attorney general announced a $1.3 million settlement. brian jacob sorn and his husband bought a home from hohgard from great falls, virginia and so did a doze