Roy you might think about that again - his actions are very important. For example if it was indeed his action to walk into a store at 420 am and buy cleaning products and then deny that to LE and they have proof - that action and denial says something pertinent to the case. If he walked into Lifetime Fitness and tried to use his wife's card on the day she is missing well that certainly says something doesn't it. Not all circumstantial evidence is physical in nature -and a persons actions, where abouts, and emotional feelings about a deceased person are indeed relevant and circumstantial - motive is all about thoughts and actions. Circumstantial cases are built on a variety of things not just physical evidence. There is little doubt this will be a circumstantial case - without a confession or eyewitnesses - it can be nothing else. How he treated his wife will certainly be important.
Sure, we already know he treated his wife bad. And we don't know he walked in HT at 4:20. If you are on a jury right now, do you find him guilty?