I couldn't agree more and I feel like an absolute dolt for not knowing how this process works. I can't imagine ever being indicted for anything without at least being interviewed.
Very true. Usually felony arrests occur without interviewing when the arrest takes place while the crime is in progress. Otherwise, they are investigated, meaning determining who the suspects might be and ascertaining their whereabouts during the time the crime was committed, unless there is sufficient evidence to get an arrest warrant without it, such as fingerprints, video, eye witnesses, etc..