If I'm following what you're arguing, she was kidnapped by lure through the pay phone call after he bought a pregnancy test, and now she's gone after meeting him at the boat landing. I realize there's more evidence than that, but I'm referring to the critical chain of events right before her disappearance that the state says makes SM her kidnapper.
If I was juror, I'd be asking myself this: If she was being kidnapped by lure to PTL for whatever purpose, what was she doing messing with her Tumblr, driving to a restaurant and hanging out, leaving, going back, going home, then calling SM, then deciding to drive to PTL? If the pregnancy test was part of the mission for SM, where does it fit? Certainly not PTL.
My problem would be that the gap between the lure call and PTL, and the fact that no one can show me who was in the truck, casts reasonable doubt on who was doing what that night from what phone and what vehicle at what time. I wouldn't have trouble concluding that SM's involved in a crime against Heather. I'd have trouble taking the circumstantial trail I was given and linking up SM and Heather at PTL after she journeyed around post-lure call and we have no idea who else was moving around at the same time. It's the additional passage of time and other events in between, plus the gap in where SM, not his phone or his truck, was during this time that would give me pause.
There was a second call between Heather and Sidney's phone at 3:17 that lasted 4 minutes. Immediately after the call, Heather went straight to PTL. Heather would never of talked with Tammy for 4 minutes or met Tammy at PTL at that time of night or any where. It had to be Sidney she talked to at 3:17 and Sidney she planned on meeting at PTL