Imho, Dale, with or without an accomplice, had plenty of time to leave Michelle anywhere within a 15-20 drive off the route from his condo to Walden Palms. Condo to Walden is 31 minutes according to Google maps. If he left the condo the first time with the kids & did arrive at his folks at 4:30 as a "witness" can verify (must be a neighbor for me to consider it credible), he could have left (been given a ride?) Rose Boulevard by 4:50, & arrived at the condo by 5:15. He could then easily leave the condo in the Hummer with Michelle by 6 at the latest and dropped her off anywhere within 15 minutes away from that route, spent 30 minutes at the site and arrived at Walden Palms by 7:30.
Possible time line:
3:18 - 4:10 at condo. (neighbors video & DS Jr. statement)
4:10 - 4:30 in transit to Rose Blvd. (DS Jr. statement)
4:30 - 4:50 at Rose Blvd residence. ("witness")
Hey Mom, I need a ride back to the condo to xyz. Can I have a ride? Bring the kids and while my friend Jkl and I xyz, you guys can go to MacDonalds. My treat; here's $10.
4:50 - 5:20 in transit.
5:20 - 6:00 at condo.
6:00 - 7:30 in transit to Walden Palms. Veers off course and drives approximately 6-8 (10?) miles in any direction off route to drop off Michelle. Stays up to 30 minutes at drop off site. Returns to route.
Hey Mom, my friend Jkl's girlfriend called him and he's going to drop me off at the Millenia Mall can you pick me up at 7:30? Great! Meet you there.
7:45 - 8:00 receives call "informing" him of Michelle's disappearance and leaves Rose Blvd, taking Nela Bridge route. Throws iPhone off the bridge on the way back to the Condo.
Notes:
1) By the time Michelle is officially "missing," at between 7:30 & 8, neither Michelle or the Hummer is with Dale.
2) "My friend Jkl" does not have to exist; he could be some guy that Dale is meeting for the first time to talk about the joys of joining 501 and Dale must have lost his card while buying a coke at the Mall.
3) NO ONE IS KNOWINGLY ABETTING DALE IN THIS SCENARIO.
4) Dale has 1+ hour alone with Michelle and Hummer in the condo.
5) Clearly, this is premeditated and Michelle is alive while in the condo and Hummer.
6) If Dale did go to work the 18th, he could have transported Michelle to a different site at that time. (He could have used a rental car & there is a rental car company on Hoffner. Tire tracks would be a consideration, however.)
Please, PLEASE blow holes in this theory, if you have linked evidence that I'm wrong. AFAIK, we only have Dales claim that he left the condo at 4:10 & arrived at Rose by 4:30; anything verifiable would be better. Help me, please. What did I miss?