Thank you, bears10

I appreciate your bringing these issues to the discussion.
The mother's tweets seem ominous, yes, or perhaps simply troubling and may go to her mental/emotional state at the very least. Whether her son was affected by her tweets or her words or her actions and then went on to kill 4 persons...I have a hard time connecting these dots.
There may be more we do not know about the mother-son relationship but from what I've read, she was devoted to helping the boy.
At this point, I do not see a connection between Mom's tweets re debts and a LI policy with the murders of both parents, a sister, and a family friend. It's possible, I suppose, but it just doesn't ring true to me. And it isn't as if this family was new to a precarious financial situation.
The son went 'ballistic' for some reason on that night and time, at the very end of 2017. So sorry he was able to locate a weapon to make his acting-out so deadly.
~jmo~