I voted "within the week", but debated between the option of "within the week" and "within 2 weeks."
I think that sometime in the past week or two, LE has had a big break in this case and has amassed leads and evidence. Changing the case to a homicide, naming a crime scene, telling the family that Haleigh is deceased, and bringing individuals they believe know what happened to the crime scene, indicates they're close to bringing charges against one or more people.
I expect that from this week forward, we'll be seeing news in this case on a daily basis, as more becomes known and is released publicly.