[Eva]

Random killers seldom take the time to bury the body, do they? If there is no connection between the killer and the victim, the murder has no reason to hide the body.

[SarahW]

He might have told himself he just wanted to "do" her...then killed her as a last minute change of plans. His evasion about the nature of the OTHER assaults leads me to believe he would be the kind of rapist to try to keep the body from being discovered right away - like he's trying to hide the cirme from himself as much as he is trying to hide it from discovery. I don't think he would get a shovel and dig, but he might put her in a natural depression and put branches and leaves over her.