Suicide and Homicide in State Prison and Local Jails, US Department of Justice, August 22, 2005 [report indicating that prison death rates for homicide, suicide and AIDS have declined substantially in state corrections facilities since 1980]. Excerpt:
Over the past two decades, State prison and local jail inmate mortality rates have displayed some dynamic changes. Suicide was the leading cause of death among jail inmates in 1983 (129 per 100,000 inmates); by 1993 that rate had been cut by more than half (54 per 100,000 inmates), and illness/natural cause (67 per 100,000) had become the most common cause of jail deaths. By 2002 the jail suicide rate (47 per 100,000) had fallen to nearly a third of the 1983 rate. Rates of death from AIDS-related causes in jails also declined; the 2002 rate (8 per 100,000) was less than half of the 1988 rate (20 per 100,000). As a result of these reductions, the overall mortality rate in local jails dropped 37% between 1983 and 2002.
Read the full text of the report here [PDF]. Reported in JURIST's Paper Chase here.