I'm still about 9 or 10 pages back today, but something has crossed my mind that I can't stop thinking about. This open space park that is popular with photographers/etc... was it accessible during the road closure in the area? I understand the road runs directly beside it, but can it be accessed from another road?
I'm going to try to explain my thoughts without sounding confusing. IF the open space park is accessible by another road, would the section of the park where Jessica was found be considered the back?
I ask this because I wonder if the perp did not know the road was open to traffic again (he might not have seen any cars, especially if it was nighttime when he left her), so in placing her at what might be the back of the park, he thought she was hidden well. He might have thought, "no one comes way out here to the back of the park, and with no traffic on this road, she'll remain here for a long time."
Yes I've read posts about seeing tire tracks near the spot where Jessica was found. My suggestion doesn't align with this. The tracks could have been from another car from another day?