Of all the arguments in support of capital punishment, perhaps the most emotionally compelling is that it provides "closure" for the loved ones of murder victims. Prosecuting attorneys, politicians and journalists commonly refer to how executions allow family members to "move on" from their pain, providing a sense of relief at knowing that "justice" was finally served.
...Stanford University psychiatrist David Spiegel believes that the theory that executions provide closure is "naive, unfounded, pop-psychology." Contrary to expectations, Spiegel says, witnessing executions not only fails to provide closure but also often causes symptoms of acute stress. "Witnessing trauma," he says, "is not far removed from experiencing it."
Spiegel has concluded that "true closure is achieved only through extensive grief work." This process requires families to acknowledge and bear their loss as well as to put it into perspective. It necessitates a network of support systems: counselors who will sit with, listen to and work with survivors; work environments flexible enough to accommodate counseling sessions and the down time that is a natural result of grief and stress; and victim assistance programs that make sure those things happen.
In researching a novel on capital punishment, forgiveness and closure, I found that the promise of closure made by district attorneys and others often perpetuated the already long-lived pain that is endemic to violent loss. Typically, a death sentence results in years of legal wrangling as the defendant attempts to overturn the jury's verdict or the sentence. The process is costly and emotionally draining and usually waylays any true healing that might have taken place had there not been a constant reminder that justice had yet to be served. This is why many families of murder victims prefer that offenders receive a sentence of life without the possibility of parole. Rather than focus on what could be a decades-long march to a death chamber, once a verdict is in, survivors can go about trying to put their lives back together.
http://www.washingtonpost.com/wp-dyn/content/article/2009/11/09/AR2009110902794.html