Mollie's clothing was found at the location where her body was found. How does he explain that? She was wearing clothes when she was abducted, and according to the warrant they were found at the same location as her body. Are the sharp object cuts only on the body, or also on the clothing?
How much blood is in the trunk? Where is it located? Does it suggest multiple injuries, or a head wound (known to bleed profusely).
"In clinical circles, it is well known that even “trivial” lacerations of blood-rich areas such as the scalp may bleed profusely and persistently."
Fatal hemorrhage from simple lacerations of the scalp
If there was one head injury prior to arrival at the cornfield, there should be one pool of blood indicating the position of her head in the trunk. If she had multiple fatal knife injuries when she was in the trunk, there should be several blood pooling areas in the trunk.
I'm confident that the prosecution will be able to prove that Mollie was attacked with the sharp object at the cornfield.