To designate a client as "Deceased", click on the "Edit Case" link, check the "Deceased" box as shown here: https://simon.d.pr/pqYgvG

Designating a client as "Deceased" does not remove them from the database.

Also, if you need to run a report to view all "Deceased" clients, you can use the

"Filter by Demographic Profile Match: Other Case Info: Deceased" option as shown here: https://simon.d.pr/oQWejI