Can you help solve a WW2 murder? Justin Kirby’s great uncle worked at Bletchley Park during WW2 and was murdered in 1941. Some one must know what happened, can you help?

Some links here and details from Justin below:

Bletchley Park Roll of Honour entry:
http://www.roll-of-honour.org.uk/m/html/maitland-kirby-roddy-george.htm
Whaddon War Memorial page:
http://www.roll-of-honour.com/Buckinghamshire/Whaddon.html
His gravestone:
http://www.roll-of-honour.com/Buckinghamshire/images/WhaddonKirbyRMGrave.jpg
The announcement from the Time about his death:
http://ghgraham.org/georgekirby1876.html