過去式：perpetrated 過去分詞：perpetrated 現在分詞：perpetrating
"There is no crueler tyranny than that which is perpetrated under the shield of law and in the name of justice." -- C. L. De...
... from occurring; it just changes the equipment used to perpetrate them.
...要寫成:about suspected fraud (that is可省略) committed(或是perpetrated) by employees.