>> john ruetten? >> how long did you guys date? said it was something about art. >> reporter: detective lazarus seemed uncomfortable and vague in her answers, especially when detectives asked about sherri rasmussen. >> you know, i may have talked to her you know - >> mentioned hospital maybe? talked to her at hospital? >> yeah, yeah, i may have -- i'm thinking back, bringing up all these old memories >> reporter: detectives turned up the heat. >> did you have a fight with her? >> fought? >> duke it out with her? >> no, i don't think so. >> you'd remember that right, would be pretty -- >> yeah, i would think so. >> most of us can remember without much difficulty the number of fist fights we've had over the course of our lives but while detective lazarus at one point answers know when asked if she remembers attacking sherri or being attacked, at other times can't recall that ever happened. >> doesn't sound familiar. what are they saying that i fought with her and i -- jump i fought with her so i must have killed her come on. >> repor