However, for their peace of mind, they do deserve an answer as to
why this freak accident happened.

I don't know that it was a "freak" accident. I think the pilots should have
saw this coming a 100 miles away. Tailwind, snow and ice covered runway,
short runway, low visibility, large fast aircraft, no over run with a
densely developed and populated area immediately after the airport barrier
fence. If the reverse thrusters or spoilers didn't work that only put the
icing on the cake that was already baked.

I wonder what the exact conditions were at the time and what are the FAA
minimums for that runway and what the company's policy was with the
situations they faced. That will determine your lawsuits.

Kobra