I'm certain the OP and everyone involved in this incident are already doing a sufficient job of kicking themselves & pointing fingers of blame. No need for us to add to it, at least not on this post. Let's leave this a place for offering prayers, comfort & support. There are a lot of valuable take-away lessons for everyone to remember, pass along & discuss -- but NOT HERE.
The deepest wounds & the ugliest scars caused by this incident will be Survivor Guilt and Blaming Others. I pray that this family & these friends won't be torn apart but instead find the grace to pull together and the grace to continue on. This is going to draw on the OP's friendship & loyalties, and I pray for him too, for wisdom in how to be their best friends in the days, weeks, months, & years to come.
The deepest wounds & the ugliest scars caused by this incident will be Survivor Guilt and Blaming Others. I pray that this family & these friends won't be torn apart but instead find the grace to pull together and the grace to continue on. This is going to draw on the OP's friendship & loyalties, and I pray for him too, for wisdom in how to be their best friends in the days, weeks, months, & years to come.