between ideology, sort of a hatred of the growing and advancing technology within the world. reporter: when david married his wife, linda, in 1990, ted was supposed to be the best man. but refused to attend. that s when linda started asking questions. i struggled to answer the questions, why did he quit his job? why is he living the way he s living? why has he rejected his parents? why did he refuse to come to our wedding? reporter: and then the letters started to arrive. a diatribe of hatred toward modern technology. it used to be that i suffered from hardly any tension at all around here. but the area is now so messed up that my old way of life is all shot to hell.
he had this peculiar nexus between ideology, sort of a hatred of the growing and advancing technology within the world. reporter: when david married his wife, linda, in 1990, ted was supposed to be the best man. but refused to attend. that s when linda started asking questions. i struggled to answer the questions, why did he quit his job? why is he living the way he s living? why has he rejected his parents? why did he refuse to come to our wedding? reporter: and then the letters started to arrive. a diatribe of hatred toward modern technology. it used to be that i suffered from hardly any tension at all around here. but the area is now so messed up that my old way of life is all shot to hell. this was not just a disgruntled brother.
it used to be that i suffered from hardly any tension at all around here. but the area is now so messed up that my old way of life is all shot to hell. this was not just a disgruntled brother. but this was something quite more serious than that. reporter: attempts to get his brother counseling in montana were unsuccessful. given that ted was an adult, given that there was no evidence that he was an imminent threat to himself or others, essentially there was nothing we could do. reporter: around the same time, david was receiving disturbing letters from his brother, ted, universities and airlines received exploding bombs in the mail. many contained meticulously carved wood. we suspect this is the handwriting of the unabomb subject. reporter: the haunting similarities between ted s dark
between ideology, sort of a hatred of the growing and advancing technology within the world. reporter: when david married his wife, linda, in 1990, ted was supposed to be the best man. but refused to attend. that s when linda started asking questions. i struggled to answer the questions, why did he quit his job? why is he living the way he s living? why has he rejected his parents? why did he refuse to come to our wedding? reporter: and then the letters started to arrive. a diatribe of hatred toward modern technology. it used to be that i suffered from hardly any tension at all around here. but the area is now so messed up that my old way of life is all shot to hell. this was not just a disgruntled brother. but this was something quite more serious than that.
reporter: and then the letters started to arrive. a diatribe of hatred toward modern technology. it used to be that i suffered from hardly any tension at all around here. but the area is now so messed up that my old way of life is all shot to hell. this was not just a disgruntled brother. but this was something quite more serious than that. reporter: attempts to get his brother counseling in montana were unsuccessful. given that ted was an adult, given that there was no evidence that he was an imminent threat to himself or others, essentially there was nothing he could do. reporter: around the same time, david was receiving disturbing letters from his brother, ted. universities and airlines received exploding bombs in the mail. many contained meticulously carved wood.