I'm writing a novel that is set in Vienna during the period when it was occupied by, among others, the Americans and the Soviets (1945-1955). The central district (grey in the image below) belonged to all the occupational powers.
In my novel there is a character (a native Austrian) who seriously injures (on purpose) an American soldier or officer. After the crime he needs to hide somewhere. He considers running to the Soviet zone in the hope that it will make it more difficult for the Americans to find him there. This leads to the first question.
Question #1: Did the Soviets cooperate with Americans when investigating serious crimes?
Let's say he runs to the Soviet zone. The Americans somehow find this out and ask the Soviets to help them find this criminal (or at least not interfere). How likely are the Soviets to agree (provided that the character committed a serious crime against the Americans and the Soviets are not interested in him at all)?
Question #2: Whose police forces would perform a large operation, if the need arose?
Now assume the Soviets help the Americans find the protagonist actively or passively. It turns out the protagonist has barricaded himself.
The only way to catch him is to storm that place.
Whose troops (Soviet, American) are more likely to do this special operation given that
- it happens in the Soviet-occupied part of the city,
- the criminal is an Austrian,
- whom the Americans want and the Russians don't
Note: Since I'm writing fiction, I do not need 100 % historical accuracy. I only need believability.