Glasgow Ju88 crash

[Al Fleming]

I am looking for information on the crew of Junkers - 88 M2+CK of 2 Staffel. 1 gruppe kustenfliegergruppe 106 which was shot down north of Glasgow in May 1941. 2 of the crew were killed and 2 captured. In 1946, 1 of these men - Feldwebel Willi Muller was hanged with others after having been found guilty of the murder of fellow POW in the internment camp at Medicine Hat in Canada. Do you know where I might get information on the background of the aircrash and on Willi Muller particularly? There is a small amount of info on the web, but I wondered if there would be any surviving Luftwaffe records?