[Rusty Roberts]

Actully, I think it likely the motive was pure freedom. I think Scott had been planning this, and was already in the "single" mode when he met Amber. As to when the actual day the event would happen, that may have been somewhat up in the air, but he was running out of time.

I have a feeling getting pregnant sealed Laci's fate, sad to say.

[Devil_Anse]

I think you've depicted Scott's state of mind (around the time of the murder) very accurately.