I don't see it as unethical. They could have just put out his mug and said we're looking for this man for suspected murder . Perhaps they didn't want to alert him that they suspected him but we see it all the time where an actual photo is put out. That's not deemed unfair. If someone's gone on the run that's normal to do that- they need to be apprehended.
If LE really had no inkling about him by mid May, I would be very surprised.
I get what you are saying, and agree with the majority here, it would be unethical to put out a sketch based on a POI. I just can’t imagine it, but won’t rule it out. I’ve watched too much HBO! Still, that is pretty far fetched, and I wouldn’t have dreamed that up in a million years.
On the other hand, back to the case. There is nobody identified yet. No one arrested, anyway.
This case is so stymying, with all the evidence, and no identification of who was, at the time, a slightly short, slightly overweight man, with dark facial hair, who dressed like a native to the area, and didn’t appear particularly poor, or particularly rich, in the images.
Profiles are helpful, and it was mentioned in the early days, one had been developed by the FBI, but it has never been released.