(Reuters] – Oklahoma plans to use a contested trio of drugs on Thursday in order to execute Julius Jones. Jones maintains his innocence in the 22 year-old murder he was convicted for and has drawn the attention of anti-death penalty activists and celebrities.

Jones is now awaiting clemency from Republican Oklahoma Governor Kevin Stitt. He has not yet ruled on a recommendation by the Pardon and Parle Board of 3-1 that Jones receive a life sentence in prison.

On Wednesday, the Governor’s Office did not respond immediately to our request for comment.

Jones will be executed by lethal injection at 4 pm CST (2220 GMT) at McAlester’s state penitentiary.

According to local media, students at several Oklahoma City high schools marched out of school Wednesday morning in support of clemency.

Jones, 41 was convicted of murdering Paul Howell (insurer executive) in 1999. He was among five prisoners who were granted stays of execution by a three-judge panel of U.S. Court of Appeals’ 10th Circuit Court of Appeals.

The U.S. Supreme Court removed the stay the day after Grant died. Grant was put to death by lethal injection hours later. Witnesses claimed Grant vomited and convulsed before dying. However, the Department of Corrections stated that there weren’t any complications.

Grant had served as a plaintiff in a suit set to proceed next year. The state denied Grant his right to a postponement of his execution.

Jones’ lawyers have stated evidence that Jones was with his family at the time of the murder. This they claim the jury didn’t learn because Jones’ lawyers did not fully investigate.

There have been many calls to Stitt for Stitt’s acceptance of Pardon and Parole Board’s recommendation that Stitt accept the clemency offer.

Kim Kardashian West is one of the many celebrities who has shown interest in Jones’ case. She posted a number of tweets calling on Jones to have his sentence reduced.

A few evangelical leaders, along with a couple of Republican state legislators, such as state Representative John Talley also question Jones’ guilt. They urged Jones to commute his sentence.