I believe he is buried in the Reichswald Forest War Cemetery. Check the Commonwealth War Graves Commission website for more details.
You might like to contact the 100 Squadron association website 100squadronassociation.org.uk
You could also try the National Archives for the 100 Squadron F540 for that date. I believe there is free online access to such records whilst the Archives are closed to visitors.
To find out his service record you could apply to the RAF. Details of how to do this can be found at
https://www.gov.uk/get-copy-military...-elses-records
Hope this helps
CC