Sunbather
Le photographe est mort
Agnostic is an Adjective. If just means you don't know for sure.
You can be an Agnostic-Christian, saying "I don't know if God really exists, but I believe he does."
It just means you lack the evidence to prove in full if your stance / belief is correct.
That's not what agnostic means though. It is the distinctive belief that we can't know. Atheism is the explicit belief that there is no deity or other force of life.