Whatever Happened to Matthias Massmann?

Today, I came across this interesting photo of a Messerschmitt Bf 109E4B that was said to have been downed during the Battle of Britain sometime around September 1940. Being an aviation nut, as well as generally insatiably curious, I wondered what happened to the pilot and how the plane ended up in that particular hanger. Thus began a deep dive into the bowels of the internet that, truth be told, I probably spent too much time on.

But, I was rewarded with some information on this particular aircraft and her pilot.

Crash Report
Crash Report from the British Air Ministry dated 12 SEP 1940

This particular Messerschmitt Bf 109 was flown by a 28-year-old by the name of Matthias Massmann.

I found this bit of information on a German website, and it is presented here, translated into English: