STARKE, Fla. -

A new lethal injection drug will be used for Tuesday night's execution at the Florida State Prison. The drug is being called an experiment on a living human being.

Inside the brick and mortar walls at the Florida State Prison, another death row inmate's time is set to expire Tuesday night.

"Killing someone to prove that killing someone is wrong is a distorted way of thinking," said Sheila Meehan, who is against the death penalty.

William Happ, 51, will be the first death row inmate to have a new lethal injection cocktail used during his execution. He was found guilty for the death of Angie Crowley in 1986.

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"Who has been in our system for a quite a while and his warrant was signed a couple weeks ago," said Misty Cash of the Department of Corrections.

The new lethal cocktail is designed to induce unconsciousness, paralysis and eventually death by cardiac arrest.

"The Death Penalty Information Center has said this is really an experiment on a human being," said Meehan.

The use of drugs used for lethal injections have been controversial for some time. One European country that opposes the death penalty even wrote Gov. Rick Scott in 2011 citing a misuse of the drug.

Missouri recently delayed an execution later this month due to uncertainty about using the drug Propofol for an execution. The supplier of the drug ordered distributors not to send the drug to any department of corrections in America because a number of states planned to use it for executions.

However, in Florida, the state will move forward with this untried lethal cocktail.

"Is our job to do that in the most dignified and humane way possible," said Cash."

The Department of Corrections said they did research on the drug to make it as humane as possible. Legislation is expected to be introduced to lawmakers for the 2014 session, which would repeal capital punishment in Florida.