when did riia find out of le paradis

RIIA appears to have found out about the Le Paradis massacre in summer 1943 , when one of the survivors, Albert Pooley, was repatriated and gave testimony about what happened. The other survivor, William O’Callahan, returned in 1945, which further reinforced the case.

What that means

• The killings happened on 27 May 1940 at Le Paradis, France.

• Allied authorities only learned the details later, after survivor accounts became available.

• The evidence from those testimonies eventually helped lead to Fritz Knöchlein’s war-crimes conviction and execution in 1949.

In plain terms

So, if you mean when the British authorities first became aware , the best-supported answer is 1943.

Note

If “RIIA” refers to a specific person or fandom character rather than the Royal/war context, I can narrow it down further.