Example taken from: Russia questions five suspects over Nemtsov killing:
However no information has emerged as to the possible motive the men could have had in killing the charismatic opposition leader. His allies believe his assassination was a hit ordered by the top levels of governmentthe top levels of government determined to silence dissenters. The allegation has been strenuously denied.
Why not say by the top levels of the government? What do you think the difference would be?