It’s much easier being the expert about one thing, rather than knowing a bit about many things- the same applies to your investigators. A useful investigation technique would be to assign cases that deal with particular issues to a particular investigator or investigative team. These assignments should be made when establishing your reporting lines within the HR department and your investigative team in order to avoid confusion when starting out.
By dividing the types of complaints and cases that investigators work on, it makes it easier to become an expert in a particular field. It’ll be easier to become familiar with regulations, policy updates and other legal matters in a specific field, as opposed to trying to keep track of amendments and policy changes for a variety of HR and ethics related topics. It also makes it easier to determine case assignment, because if “Investigator #1″ always handles cases involving sexual harassment, “Investigator #1″ will only be assigned to cases that involve sexual harassment.
Another benefit to this practice is the fact that as investigators continually work with the same types of cases, they will be able to complete the case in a shorter time frame, as they are already familiar with the workplace policy and legal regulations pertaining to the incident, they already have a good idea of the questions that need to be addressed during the interview process for all parties involved and they have better ideas of the types of evidence to look for and seek out.