I have been thinking about this tragedy and after watching the video of the father and his demeanor it would not surprise me in the least if he didn`t commit this crime and staged it so that it looked like his father in law committed the crime after all he was the one who had the motive not his father in law.
Speculation has been that the FIL was the guilty party , what was his motive .?
I speculate that it may have been the father of the children and husband of his wife that committed the crime.
What was his motive ? his wife`s parents were influential in breaking up the marriage and separating him from his children and his wife ,and the children were Autistic ,he was also influenced to some degree by the Jehovah`s Witness belief in a resurrection of the dead if they die before Armageddon which he alluded to in his speech.
And saying they were now in the New system of things. { typical J.W. teaching }
The media has jumped to the conclusion the father in law committed this crime maybe law enforcement should take a closer look at the father of the children .and husband of the estranged wife..
I`m just saying its another possibility .