As you know, Papabear is not a trained psychologist or therapist. Also, some letter writers have indicated they are in serious crisis mode. The below is a list (in progress) of helpful organizations and other resources where professionals can provide you the kind of assistance Papabear cannot.
National Suicide Prevention Hotline
Domestic Violence Help
The National Domestic Violence Hotline at thehotline.org, which includes online chat for immediate assistance.
The Childhelp National Child Abuse Hotline, 1-800-4-A-CHILD (1-800-422-4453)
The Crisis Text Line: text START to 741741
The National Center for Victims of Crime at 1-855-4VICTIM (1-855-484-2846)