EMDR - After Death Communication
IADC is a specific type of therapy that helps patients process grief and loss after someone has passed away. It allows the person to experience being reconnected resulting in healing deep sadness associated with grief. IADC®, was discovered in 1995 by Dr. Allan L. Botkin, Psy.D. I had the privilege of training under him and have seen amazing results. You do not need to believe in afterlife or be spiritual yourself, you just need to be open to doing treatment and working towards a resolution of your sadness around the loss. Results are long-term and this type of treatment is short-term.
For further information, you can read Dr. Botkin's book.