This isn't just a business-as-usual government-screws-up story. I have not seen a case of wrongful execution as bad as this. So while it's not evidence of an interesting new phenomenon, it's new evidence of an interesting phenomenon.
In most cases where social justice stories are plastered to the top of the front page, the people voting them up also believe that the story is uniquely interesting or important. Likelihood that this particular comment of yours is going to be used to justify many future stories like that, most of which will not be germane to the site: extremely high.
I also object to the idea that miscarriages of justice in death penalty cases are a "new phenomenon". This isn't a new phenomenon. It's just pithy, enough to capture the front page.
Having lived in Texas for 12 years I totally agree that this case isn't unique, in that Texas regularly appoints public defenders who are unqualified for the job or so overworked they can't possibly provide an adequate defense (1). And courts are happy to convict people whose lawyer sleeps during the trial (2). I express no opinion on whether this is suitable for HN.
(1) "Appointed as his advocates were a general practice lawyer who never had handled a major felony case and a veteran who had a heavy case load."
(2) "The presiding judge said that the Constitution guarantees a defendant a lawyer, but it does not guarantee that the lawyer must be awake." http://www.secondclassjustice.com/?p=196
Can't say about the rest, but this story was very educational for me. By far the best argument against death penalty, and one that is not voiced enough (usually people oppose it because "murder is murder") (best as in: hard to argue against).
Even with faulty convictions, police may be seen by the wider community as able to do their job and thus the conviction for them is a cover up for incompetence. It may also be a vent and prop for communal racial prejudice. Also, victims' families are said to get the closure they think want, and incidentally many are against capital punishment anyway. Lastly, with faulty convictions, not only is the crime of murder perpetuated within the system, but the true killer walks free unhindered. Justice? Anything but.
