"Person of Interest"

Once again, police are looking for a "person of interest". Just who do they think they're fooling? Why must we create vague phrases when it is obvious what we mean? It's not like the police are creating less suspicion around this person by calling them a "person of interest" just in case it turns out they're not guilty of anything. A person of interest could describe a potential witness, but if you even use that phrase to describe a potential witness, you'll now create undue suspicion around them. So just call a suspect a suspect and a potential witness a potential witness and stop inventing new phrases that add no value to the communication between the public and the police.