Unfortunately, none of these actions will be given a public statement by LE. They are not obligated to comment on the specifics of their investigation. The only time this information becomes available, is when a case goes to trial. Even family members are unaware of these details until a trial commences, or a case is closed. They may be updated on toxicology results.
The only obligation LE has to give a public statement, is when COD is concluded, in the case of homicide- when MOD is concluded, when there is a person of interest and they require the public's assistance, or there's a risk to public safety, when an arrest warrant is issued, when an arrest is made and charges laid, or when a case is closed.
We very well may know when the crime scene is released, because we will figure it out, or the media will report on it. I don't believe it requires a public statement, however.