[Julian Hendy]

What is the easiest way to check whether a shoot down was claimed by a pilot?

I'm trying to find who may have shot down a Halifax bomber (from 426 Sqd RCAF) over Rouen around 3.00 am on 29th June 1944, on the return journey from a bombing raid on Metz.

Can anyone help me with source references - or give me any tips on how I can research this further? (I speak German as well)

Thanks