alt Hacker NewsMaybe. The average homicide clearance rate in the US is only around 60%. But that includes a lot of killings where nobody really cares about anyone involved. This was a much higher profile crime so it would get a lot more attention. But there are high profile cases that get a lot of (at least local) attention that don't ever get solved either.
It is really difficult to ascertain motive and suspects when it’s a chronic homeless case getting murdered. It could be a thing from drugs to just looking at a crazy guy wrong one night, you literally have no leads unless there is a video or some other piece of hard evidence. It isn’t really about caring, judt that the environment they live in is so chaotic and uncontrolled that you’d have a suspect pool that is too big to reasonably investigate.