. >> narrator: james kallstrom was the powerful boss of the fbi's new york office. watching from a distance, he saw o'neill's attitude and expertise make enemies among the group that surrounded louis freeh. >> yeah, i'm sure there was some jealousy in the bureaucracy. there always is. you can get by with some sharper elbows for a while, but you need to be right a lot. you know the old saying "when you run with the wolves, don't trip," you know? >> narrator: at headquarters, a whispering campaign began about o'neill's personal life. there was one version: married his high school sweetheart and had a couple of kids. then there was the truth. >> john had been separated from his family for some time, and i think john would have said to you his family suffered as a result of that, as a result of his devotion to his job. >> i think the fbi was his mistress. he loved it. he loved it more than he loved any woman in his life. he loved it. >> narrator: and he loved valerie james. >> very first time i saw john, i did something i had never done before and will never do again. i