I'm not saying one thing or another happened, I don't know. But surely we know enough about suicide to not use 'he seemed so happy and full of life' to support a murder argument.
If it was an assassination, this is some Michael Clayton level stuff.
My dad once worked for a pet supply company, I don't remember his exact title but he reported to the owner. He was introduced to an individual that worked for the mob, only went by his first name, and was introduced as the guy who can take care of whatever is needed.
He heard later (obviously hearsay at that point) that Big Mike had indeed killed a guy that was causing problems for the owner. There's no way of knowing for sure obviously, but my dad's read on both Big Mike and the story was that it was absolutely true.
If a small pet supply company has connections to clean up a mess, as it were, I can only assume a company the size of Boeing could as well.
If it was an assassination, this is some Michael Clayton level stuff.