"There is no direct evidence...yet."
Tried and convicted case closed. LOL The guy is due for sentencing is exactly the reason he seems least likely to have anything to do with it. Still sounds like a botched robbery to me.
1. Hale tried to have Lefkow killed.
2. Hale is one month from sentencing for that crime.
3. Lefkow's husband and mother are murdered.
Now, the above isn't by itself proof, but it is either a crazy coincidence or a possible link. If nothing else, the white supremacy angle deserves looking into. To do otherwise would be nothing short of negligent.
Also, what have you seen or read that leads to a "botched robbery" conclusion?