An Investigating Officer (IO) conducting the investigations will generally do the following:
Interview and ask you questions about what you know about certain facts and circumstances relating the offence being investigated.
Record a written and signed statement (also known as a Long Statement, Witness Statement or Investigation Statement) from you which contains the information you have provided during the interview.
Search a place to look for property, documents, physical objects and other material which may be relied on as evidence.
Take possession of physical evidence which may be used as exhibits in the case