I am doing a re listen to the books and noticed some similarities between the hit on Marcone (that resulted in the 'Death' of the Beckett girl) and the hit on Harry at the beginning of SK. Both involved shooters in the back of black truck and both took place at a park. I will have to look to see if it was the same park on not when I can get home and look at the books.
I don't think this means anything, just more examples of Jim repeating things in his writing.