I think everything we need to know is in the OP:
https://signalscv.com/2017/01/27/bizarre-disappearance-william-cierzan/
There are some great questions also presented when this thread was first opened. It would be worth revising. Right away we can see that the reporting is carefully crafted to not outright lie, but it is worded in such a way as to sway one's mind into thinking something false. To be fair, they (the media) can only report on what is told to them. We all saw video of a white SUV pull up into the driveway backwards, then leave about 6+ minutes later. It is edited to briefly show only a the SUV. The surrounding areas are not revealed, and the video is cut to not show the time lapse between 5:06 and 5:12 so we can't see the (mysterious) driver exiting or renetering the vehicle. We only see the vehicle pull up, cut, vehicle leave.
So while it's probably true that the video doesn't show him leaving the house, doesn't show any friends driving up, and doesn't show anyone coming to the door, the article also doesn't mention relatives coming and going, or anything being carried out through the garage or side gate. Those little tidbits were purposefully omitted. We cannot see if the garage door opens and closes, or any other tell tale signs that would point the public into believing what may have happened.
For purposes of police work, I think this is very smart. For us curious george's it's a bit of a bummer because we want to help find William.
So it says between 3:30 - 4:00 William was in good spirits. At 5:00 his mood is not indicated, but he said the chicken was cooked. Hmmm At 5:06 an SUV arrives, and at 5:12 it leaves.
I end this post with some thought provoking questions that are brought on by other comments from a WS member, which will hopefully get our brain juices flowing and lead to other important questions. Depending on where his wife worked and her route home, would she normally "be home" at 5 or "leave work" at 5? We don't know that, do we, but maybe the driver of the SUV does. What would her travel time would be if she left work at 4:00, and what would it be if she left at 5:00?