but they say saipov was likely connected to individuals who were the subjects of investigations. and they offer another clue. he was associated with isis and he was radicalized domestically. reporter: officials say saipov lived in ohio, florida, and patterson, new jersey. they aren t yet saying how or when saipov was radicalized in the u.s. what is your best take on how he was radicalized? many cases combination of online and offline. people start hanging out with like minded individuals, people who embrace isis ideology, and maybe go online to reinforce their nascent jihadist views. many cases people radicalize because they have some personal issues, whether it could be family problems or job problems. reporter: expert lorenzo vadeno says the process of becoming radicalized means spending a lot of time online. now it is apps like telegram,