Snoopy,
What a great tragedy, the loss of those so young - even 50 is young.
It is the burden of those of us who are more empathic that we feel other's pain. I have noticed this in your Posts. It can lead to the worsening of any Conditions we, ourselves have.
I cannot explain your knowing the identities, there is more in this World than we can ever know - I have had similar 'feelings' with family and friends in the past.
It is a blessing your Son was unhurt in his accident - I am relieved for you.

Dave.