Benoit did nothing wrong.
The location of the bodies changed 3 times in the first day of the investigation

Chris was found with further decomposition than his wife and son

Chris's wallet was missing

Nancy' purse was missing

There were signs of a break in

Chris had a cloth around his neck as if he was trying to minimise bruising

Chris's phone was missing

The house looked disturbed, as if someone had broken in and was discovered

Chris made a phone call the day before he was alleged to have killed Nancy where he was said to sound as if he was reading from a script

The text about the dogs was said to be different from Chris's texting style

Chris's autopsy showed that he had no alcohol in his system for days, there were several half empty bottles of hard liquor in the living room

Chris's autopsy showed that he was sedated the day he died

The weight machine was set up in such a way that it wouldn't hold his weight, no one has been able to replicate the suicide method with dummies