“We cannot determine whether the addition to the letter was made by someone within the office or by someone with access to the office, but it is on my letterhead and the responsibility for it lies with me. A valuable lesson has been learned and new procedures will be adopted as a result.” —Lawmaker Puzzled by Obscenity in Letter (AP|Yahoo!)

Passive verbs are loved by people who are found (by someone) to have been involved in actions that are considered (by some) undesirable.

Emphasis was added (by me).