Bitch + no love = boyfriend.
Maybe the hit came through her boyfriend...that would be the way to do it...and where her company is...probably lotsa scum available...and I'll bet the boyfriend has "elite" background just like her.
So, it's ordinary thugs or a hit via herself or connections. Not pros...just very bad dudes.
By the way...Let's see Jack's will.
Just my personal opinion, but I think you should lay off Jack’s wife unless you have proof of something untoward that points to her.