but she'd kept in touch with her old friend mary higgins back in iowa. e's, like, a list of numbers, every time she changed it. i'd cross it out and move on. >> why, mary wondered, did tracey keep changing her contact information? what or who was she running from? tracey's best friend was afraid. >> i feared that i knew something that i didn't know i knew. and i feared that -- what would happen when tracey figured out -- >> because tracey had confided in mary in the months after the attack and told her all sorts of things. things that didn't add up. like the fact that the second intruder had been wearing a ski mask. well, if he had, mary wondered, how had tracey given police a description of his face? and then there was this -- mary says she had helped clean up tracey's home after the shooting. >> the bedroom was just -- there's only one way to describe it. it was shot all to hell. >> but it was actually seeing for herself the space where tracey said she'd fired from that gave mary pause. it was just too tight a squeeze for tracey to have dived for the gu