The American Civil Liberties Union (ACLU) is requesting that Ohio Gov. John Kasich orders the state to stop performing executions after an inmate was put to death with an unused drug, SFGate.com reported.

On Sunday, the ACLU of Ohio wrote to Kasich asking him to use his executive authority to prevent the five upcoming executions scheduled this year.

Their request comes days after Dennis McGuire, a convicted Ohio killer, was executed with an unused drug that caused him to loudly gasp and snort during the state's longest execution since 1999.

McGuire's adult children, who watched their father's death and called it torture, recently announced their plan to sue the Ohio Deparment of Rehabiliation and Corrections.

In addition to the ACLU, McGuire's attorney has also asked Kasich to immediately halt the executions.

Jon Paul Rion, a lawyer for McGuire's family, said they plan to file suit "to make sure that this procedure is not utilized on anyone else ever."

Prior to the execution, defense attorneys asked the court to delay his death in fear of the unused drug causing "air hunger," inflicting "terror and agony" upon their client.

However, the prosecution argued that "you're not entitled to a pain-free execution." The court agreed with the prosecution but admitted the use of the new drug would be an "experiment."

McGuire, 53, was convicted of raping and killing Joy Stewart, a 22-year-old pregnant newlywed, in 1989.

Kasich has not made a comment on the issue yet.