In a blow to prisoners sentenced under a tough 1970s drug law, the Louisiana Supreme Court has ruled that a 2001 law cutting sentences for heroin distribution is not retroactive. That means an estimated 90 remaining "heroin lifers" sentenced under the old law will stay in prison -- and, in at least one case -- go back to prison after being released by a judge.

The court ruled last week in the case of Wesley Dick, who had been released by a judge in July after serving years of a life sentence for selling heroin to an undercover officer. Dick got a job, began paying child support for his two children, and saved enough money to buy a pick-up truck, but now he will be returned to prison to finish serving his sentence, perhaps as early as March 20, when a hearing has been set.

The state high court also ruled against release for heroin lifer Melvin Smith, who was sentenced to life in 1977 for possession with intent to distribute heroin. Smith never made it outside the prison walls.

The rulings were hailed by prosecutors, who had opposed granting relief to the aging heroin lifers. "Our interpretation of the law has again been upheld by the Louisiana Supreme Court," Orleans Parish District Attorney Eddie Jordan said.

"The original life sentence for this crime was a strong deterrent, and I am pleased that the Louisiana Supreme Court has maintained the conviction and the penalties imposed under the law at the time of conviction," St. Tammany Parish District Attorney Walter Reed said.

The law mandating a life sentence for heroin distribution was amended in 2001, when the legislature set new a new sentence of from five to 50 years for the offense, but it was unclear whether it could be applied retroactively. Dick and Smith each went to court arguing that the law should apply to them. Each won in district court, but state appellate courts split on the issue. The state Supreme Court has now settled the question.

"We find the legislature did not intend, nor did it legislate, that these offenders may seek resentencing in the courts after a sentence has become final," Justice Jeannette Knoll wrote in the 6-1 majority opinion. The court has long held that the law in effect at the time of the crime sets the penalty, Knoll wrote, adding that only the governor has the power to commute sentences.

But all is not lost for the heroin lifers. The same 2001 law that cut sentences also created the Louisiana Risk Review Panel, which can recommend eligible defendants be released from prison if it determines they are not a threat to society. Defendants seeking relief should go through that process, not the courts, the Supreme Court held.