If I'm recalling correctly, he was purported to have run from the Moller Ranch staging area, passing the water tower/Moller Ranch bench, onward to some uncharted trails, with the hopes of eventually ending up in Pleasanton Ridge RP.
From the park maps, we all found out this route is not possible. As someone so 'analytical' and 'intelligent' as purported by those close to him, why on Earth didn't he, at the very least, check Google maps to see that these trails DO NOT link up, at any point!?! What made him think he could park where he did and end up where he told others,unless he never really intended on being there in the first place? (classic misdirection!)
You know what trails DO link up? The one from the Moller Ranch staging area to the Preserve Staging area, with only a 0.4 mile distance. (The Preserve area also has a small loop trail, which would be way more manageable in the short amount of time he had to complete his run.) Did he change his initial course and end up going North to the Preserve instead of South to Pleasanton Ridge?
If he did, did he use this short trail run to escape? He could have parked his car at Moller Ranch, made a quick run over to the Preserve trailhead parking lot, hopped in a different car, or a bike (he had more than enough time to stop here first and leave a bicycle at the staging area on his hour drive from Berkeley to Pleasanton, which only takes about 30 minutes).
I've driven Laurel Creek Dr., the road where the Preserve staging area is, plenty of times as a shortcut from Stoneridge Dr. to Dublin Canyon Rd. to Palomares Rd. in Castro Valley. Coming from Stoneridge Dr., you will reach the Preserve staging area before you drive through the actual neighborhood. There are no houses leading up to the staging area parking lot when traveling from Stoneridge/Foothill.
I'd wager you could enter this area completely undetected, park, hike, leave your car or bicycle for several hours at the trailhead and no one would bat an eyelash, especially when it's so hot, there are few other hikers/witnesses. Additionally, Laurel Creek Dr., the road the Preserve trailhead is on, connects to Dublin Canyon Rd, which is a very popular and beautiful rural biking route that takes you through rolling hills, farmland and vineyards.
I believe that whatever he did, it wasn't seen as unusual, and didn't stick out in any other trail user's mind, if anyone saw him at all.
All of this to ask -Did he have a bike with him when he dropped off the package in Oakland? Are there cameras entering The Preserve, or at the intersection of Foothill/Laurel Creek Dr. that may have spotted him coming in/out of the area? Is anyone looking into his call records and cell phone/car GPS to figure out where he was during a brief window of unaccounted for time? All MOO.