Since the business John Spira owned with his business partner burned down in September 2007, and later another brand new building was put over it that was never used, I can only imagine that police had to think at some point that John Spira was buried underneath the building.
The information I know about the case comes from the Disappeared episode titled When the Music Stopped. If you factor in the fact that there was a snow storm coming in and that Spira's cell phone never left the area up to 11 pm on the night he disappeared, I think that had to be considered a possibility at some point. But there is no evidence to suggest that he was buried under the business since the dog searches did not hit on anything.
I do know that underground cable rolls(depending on what they are made of) can be very expensive. So maybe someone kidnapped him to try and take over his business and assets?
Therein lies the problem with these type of missing person's cases with suspicious circumstances. It all points to some type of foul play, but without a body don't police have to assume the victim is alive, whether he is being held captive or disappeared on his own? Is it like what you see on t.v. where missing persons division is different from the homicide division because the investigations are different?
I read an article that said many missing persons cases are solved, but you just do not hear about it because the solution is usually something simple. What happens to all the cases from the 1970's, 80's, and 90's that are not solved?
It has to be frustrating that without a body there is not much you can conclude with any type of certainty. Until the day John Spira's body is found, technically speaking he would still be married, still running a business, and still alive. I know that is not likely.
That has to be the most frustrating part, not having any sort of closure. Knowing nothing has to be hard. This case has remained unsolved for nearly 12 years. It would be nice to see this case solved someday, or least find out that his body was recovered. Or else the case will remain consumed with the same question: What happened to John Spira?