In a family that dysfunctional, and being JW on top of it, anything at all could have happened. Anything.
And I think we will see more and more of this kind of thing as time goes on. A person has to be emotionally & psychologically ill to be attracted to a cult in the first place. Combine that with the guilt that is loaded on liberally as a control technique; and the pressures to conform to absurd interpretations; the betrayal when the "love" that was promised proves ephemeral and non-existant and so much more and you have a potentially explosive situation. And you have it in each and every congregation on this sick little planet.
It wouldn't surprise me if there wasn't a rash of killings of various kinds in a majority of congregations more or less around the same time; the "copycat" phenomena. It could happen, as I said, because cultists are very sick in the first place, they feel they've found the answer to their questions and their lifetime of disappointments and when it fails to materialize...well, you fill in the blanks. Dangerous.
francois