In cases for employers that involve fraudulent workers compensation claims, investigators may carry out long-term covert observation of subjects. However, this could also be resolved with the interviewing of likely witnesses, such as neighbors, coworkers or relatives. If covert surveillance is needed to strengthen the case, and an investigator observes a subject performing an activity that contradicts injuries stated in a workers compensation claim, the investigator would take video or still photographs to document the activity and report it to the client.