2/NJG4 Uffz M.Ulmann

Hi guys trying to find any info on Martin Ulmann who flew with NJG 2/4
From my research i believe it was he who shot down my Grandfather on a raid on Stuttgart 28/29/7/44.
Interested to know abot his career ,pictures and info about the aircraft he flew 7/44 .I believe it was a me110.
It would be usefull to complete the picture of my grandfathers last raid , before being shot down
pete

Spelt it wrong sorry ULLMANN