I am not sure when they got into Berlin but it must have not been too long after the Russians captured it. There was still rare fighting going on. I remember Daddy saying he once saw Russian soldiers throw a German boy from a rooftop.
I have noticed that in a lot of the photos they were still wearing their helmets and also were still carrying their rifles in a few. I also have one photo of their first meeting with Russians just outside Berlin. I do know their outfit was disbanded in Berlin and they were sent home in November of 1945.
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...