As strangers, we cannot give sympathy, but we can be a wealth of compassion and selfless service. Ask the family to help verify, i.e., tattoos, scars, dental records, etc. If they are alone, have them go and get their neighbor, etc. Suicide is not a destiny, it is a choice, and the survivors did not make that choice for them. Suicide survivors have a lot of anger due to the fact that there is no explanation, and as long as they are angry, there is no grieving.
Suicide is embarrassing to the survivors.
Let them know that recovery takes time, but not forever.