to tip the scales (スケールを傾ける)

Idiom Justice

意味

to influence the outcome of a situation

状況の結果に影響を与える (jōkyō no kekka ni eikyō o ataeru)

例文

"One witness’s statement tipped the scales in favor of the defendant."

"証人の証言は結果を変えた被告の有利に。" (shōnin no shōgen wa **kekka o kaeta** hikoku no yūri ni.)