troy roberts: retired fbi agent thomas baker.g this great act of love to impress her and win her heart. john hinckley (voiceover): i've got to do something now to make you understand in no uncertain terms that i am doing all of this for your sake. troy roberts: the fbi needed to talk to foster. when agents arrived at yale university, where she was a student, the actress was visibly upset. she told them that hinckley started writing her soon after she arrived on campus the previous fall and hadn't stopped. interviewer: was he threatening? what was he like? i'm not allowed to say. troy roberts: foster held a press conference a few days later. the letters were assumed to have been love type letters. interviewer: have you ever seen hinckley, that you know of? no, i've never-- not to my knowledge. i've never met him. troy roberts: the fbi learned hinckley had told his parents he was attending a yale writer's program, but that was a lie. del wilber: he wasn't in any writers program. he was there living in a hotel and stalking jodie fos