We had a question here the other day about locative complements. They should be relocated whenever clarity is the writer's intention and there is more than one candidate phrase for the complement to complete.
I have removed "from" so that "bury" can also be eligible.
From behindBehind a tree the detective watched the woman bury the body of the person she had killed.
The detective watched from behindbehind a tree the woman bury the body of the person she had killed.
The detective watched the woman bury the body of the person she had killed from behindbehind a tree.
The detective watched the woman bury behind a tree the body of the person she had killed.