A fishing expedition is when you want to prosecute person A and don't have any reason to. So you go and search & surveil until something is discovered that the

A fishing expedition is when you want to prosecute person A and don't have any reason to. So you go and search & surveil until something is discovered that they can be prosecuted for. If the administrators were shown to be sending files around, and if their is evidence that they also used their home computers to conduct the monitoring then those systems too will be searched.