[Chris W]

If you are a witness to an investigation you aren't representing anyone! I don't see why everyone is making such a big deal of this.

Where i work, if one of my staff has a cash variance on a till of over £3 (in a till that might contain >£5k) they are investigated. If they are 10minutes late for work they are investigated. If they don't follow the absence reporting procedure they are investigated. An investigation is nothing to worry about but simply a process that has to be followed to establish facts.