Wow, that must have been an interesting time to be in Berlin! I’m sure SS-Werwolf (and their ilk) was still operating into 1946 and later, so they’re the most likely culprits.
Although it would be fun to think some renegade US Combat Engineers did the job...
Dad told me about he Sherman Zippos in the pacific.
Would burn up the snipers like no tomorrow.
He said they would receive sniper fire for hours, and foxhole it, when the Sherman would roll in, the japs would hear the squeaking tracks rolling along and run like hell. Then they would pick them off as they stood up from the brush.
I guess no one wants to be lit up like torch.
Another interesting fact.... kind of gruesome: he said burning bodies smell like pork, or a pig roast. But it still made him sick as hell.
My Father actually told me about Werewolves tho maybe not the same ones you are thinking about. He said the Germans would howl at night and there were stories going around of two American soldiers sleeping together in their shelter halves.
When one would awake to find his buddy dead and his throat slit. I am not sure that really happened but it is the kind of rumor which will spread.