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.