This is kind of a disingenuous take. What do you expect the news to do? Every morning 1 hour of "We are still pre-trial, no new evidence..." What piece of news persists for months and months after it happens, especially something as "self contained" as a murder.
Yeah, I had the same reaction over the summer when people rediscovered the 2016 lawsuit that accused Trump of raping a 13 year old. Everyone was like, "Why is no one covering this???" Because they did. Eight years ago. Nothing new happened, it just got picked up by social media again.