Editor's note: CNN's David Mattingly reports on the case of a Missouri man sentenced to life in prison for purchasing marijuana Wednesday at 7 p.m. on Erin Burnett OutFront. Vanita Gupta is a deputy legal director at the American Civil Liberties Union and director of the organization's Center for Justice. The opinions expressed in this commentary are solely those of Vanita Gupta.
(CNN) -- Clearly something is broken when a Missouri man named Jeff Mizanskey can be sentenced to die in prison for purchasing seven pounds of marijuana. With two nonviolent marijuana convictions already on his record, Jeff received life without parole under Missouri's three strikes law.
The punishment of growing old and dying behind bars for offenses like Mizanskey's is extreme, tragic, and inhumane. This should outrage us, but it should not surprise us.
This country has spent 40 years relentlessly ratcheting up the number of people going to prison and dramatically expanding the time we hold them there. We've spent decades criminalizing people with drug dependency, passing extreme sentencing laws, and waging a war on drugs that has not diminished drug use. Small wonder, then, that even less serious crimes like Mizanskey's marijuana purchase result in costly and cruel sentences.
And Mizanskey is hardly the only one.
Just as he fell into the abyss of our nation's failed drug policies and excessive sentencing laws, millions more have sat in jails and prisons, often for years, even decades on end, for low-level drug and property offenses.
While many of the lawmakers who passed harsh sentencing laws thought they were doing the right thing, the results are now in: This approach has devastated families and communities, generated high recidivism rates, drained state budgets from more productive investments, and has reinforced generations of poverty and disadvantage that disproportionately fall on communities of color.
There were ways to hold Mizanskey and others like him accountable for their actions short of sentencing them to die in prison.
We can and must do better.
It's time for states to end the costly criminalization of marijuana and recalibrate sentencing laws so that the punishment actually fits the crime as opposed to a politician's reelection agenda. Public attitudes toward marijuana are rapidly evolving, and a Gallup poll last year found for the first time that a majority of Americans now favor legalization as a better course than criminalization.
Unfortunately, laws and police practices that enforce them are out of step with public opinion. Nationally, nearly half of all drug arrests are for marijuana offenses. At least one person is arrested for marijuana possession every hour in Mizanskey's home state of Missouri, which also wasted nearly $50 million on marijuana enforcement in 2010. Although black people and white people use marijuana at about the same rate, a black person in Missouri was 2.6 times more likely to be arrested for having marijuana than a white person.
The solution is clear. Instead of taxpayers spending millions of dollars on this unnecessary enforcement and keeping folks like Mizanskey in prison for the rest of their lives, states could follow Colorado and Washington by taxing and regulating marijuana and investing saved enforcement dollars in education, substance abuse treatment, and prevention and other health care.
But even if states are not ready to expand their tax base in this manner, state lawmakers need to take a good, hard look at their sentencing laws and eliminate penalties that far outweigh the crimes they seek to punish. It is tempting to think that Mizanskey's case is an anomaly, but that is not the case.
According to a report released by the American Civil Liberties Union last year, there are currently 3,278 people serving life sentences without parole for nonviolent crimes, including marijuana offenses. Many of them, like Mizanskey, are there because of three-strikes laws and mandatory sentencing regimes. These policies force judges to impose excessively cruel sentences and forbid corrections officials from granting early release or parole, even despite exemplary records in prison.
The good news is that there is a growing bipartisan consensus all over the country that our criminal justice system has gone too far and that we can and must safely downsize our prison population. Missouri recently reformed the three strikes law that sentenced Jeff to prison for life. If he were sentenced today, he could have received a significantly shorter sentence and be eligible for parole.
As states like Missouri make these kinds of reforms, we must not forget the people who languish behind bars because of old sentencing laws now thought to be excessive. Smart reforms that correct past injustice should be made retroactive, and governors must use their clemency powers more frequently. Missouri Gov. Jay Nixon should grant clemency to Jeff Mizanskey. Public safety is not served by having him die in prison.
We're not stuck with the criminal justice system that sentenced Jeff -- a system that too often is unproductive, wasteful, and unfair. Bad policies are made, and bad policies can and should be changed.