A number of crimes are also human rights violations, so crime rates can tell us something about the degree of respect for human rights. Unfortunately, as in most cases of rights measurement, crime measurement is difficult. I won’t discuss the usual difficulties here – underreporting by victims or relatives, lack of evidence, corrupt or inefficient police departments etc. Instead, I want to mention one particularly interesting problem that is seldom mentioned but possibly fatal for crime rate statistics: most reductions in crime rates are not really reductions, especially not those reductions that come about as a result of tougher law enforcement and higher incarceration rates. When we imprison criminals, rather than bringing crimes rates down, we just move the crime from society towards the prisons:
the figures that suggest that violence has been disappearing in the United States contain a blind spot so large that to cite them uncritically, as the major papers do, is to collude in an epic con. Uncounted in the official tallies are the hundreds of thousands of crimes that take place in the country’s prison system, a vast and growing residential network whose forsaken tenants increasingly bear the brunt of America’s propensity for anger and violence.
Crime has not fallen in the United States—it’s been shifted. Just as Wall Street connived with regulators to transfer financial risk from spendthrift banks to careless home buyers, so have federal, state, and local legislatures succeeded in rerouting criminal risk away from urban centers and concentrating it in a proliferating web of hyperhells. (source, source)
And there’s no way to correct for this and adjust overall crime rate statistics because quality statistics on crime rates inside prison are even harder to get than statistics on “normal” crime rates – given the quasi lawlessness of prison life.