almost a year after trent digiuro was killed.falling hard for a guy. >> they talked about how much they loved each other. toward the end of the evening, they decided to say, "okay, what is the worst thing that you've done?" >> like let's get this out of the way. >> let's just get to it, you know, that sort of point in the relationship where you say, let me hear the worst. >> reporter: and her boyfriend said, "i killed trent digiuro." >> and at first she sort of sloughed it off, you know? "eh, sure you did." >> didn't believe him. >> no, of course not. but then he started describing it. you know, exactly how he did it. >> reporter: but she still didn't want to believe it. after all, she'd fallen in love with the guy. so she said she kind of buried it, stayed with him for another year. but now, years later and single again, she had seen a story in the newspaper about the fifth anniversary of trent's murder in which trent's dad was quoted, "somebody knows what happened." >> she started really thinking about it, and -- and it touched