>> the call was very, very close. i mean, split second anywhere and she would have, you know, succeeded in what she was trying to do. >> tina has written a book called "why i jumped" to help others struggling with depression and she speaks publicly about her ordeal. >> i wasn't even thinking of my children. i just was thinking there's no hope. >> what began on a desperate morning has grown into a supportive friendship for tina and the officers at the bridge. >> i've got to meet her children, her husband, and this was probably one of the most positive days in my whole career. coming up -- a terrible accident. and a shootout in texas. >> he's shooting at the deputy. when "caught on camera: dash