Well stated, ausbacker.
It is amusing reading all these posts on (1) the fact Hernandez should simply talk to the police and (2) how he is guilty of a murder (directly or as an accomplice) based on a few facts.
The willingness of people to tag him with a crime, on limited facts, is why people lawyer up. I believe law enforcement officers are, in general, honorable, reasonable people, but have run into my share of garden variety, judgmental morons who do not believe in the need to ask questions when forming an opinion on what 'happened' in a case. That scene from "My Cousin Vinny" with the interrogation is a metaphor for how many investigations proceed (the surprised response "I killed the clerk?" becomes the confession "I killed the clerk" at trial). Police do not have a legal duty to conduct an objective and complete investigation. They need to establish probable cause to arrest and charge. And PC is not much, so do not expect much of an investigation. Police do not and will not run down all possible scenarios when they believe they have their man, and that is how actually innocent people get convicted (by that I mean factual innocence, not people simply professing their innocence).
As for this case, we know nothing of timelines, forensics, or really anything else. Right now, you have a car in his name (good point - if you are going to kill somebody, why would you do that logically? Inform a rental company of a specific fact that ties you to a crime if you are trying to hide your involvement? Why not rent it in the names of the other guys?), a body, and two other suspects. It potentially is no more than guilt by association (which is not a crime), or it could be guilt if the facts are there. I would think if the police had a smoking gun on Hernandez, he would not just be wanted for questioning. He would be arrested and squeezed to implicate whomever the killer was believed to be. That likely means the police do not have PC on any offense on Hernandez at this point, and they are the ones conducting the investigation. The armchair police officers here who have charged and convicted him already based on media reports may want to take note of that.