Kenneth Wayne Thompson
© Yavapai County Sheriff’s OfficeKenneth Wayne Thompson
A Missouri man is hoping his belief in Scientology will save him from the death penalty.

Kenneth Wayne Thompson is arguing that the religion will help a jury understand his actions on the day he allegedly bludgeoned his sister-in-law and her boyfriend to death with a hatchet and then set their home ablaze, the Arizona Republic reported.

Jurors were asked about their views on Scientology during jury selection in the Arizona murder trial, the paper reported - and Tom Cruise's name was mentioned during opening arguments.

Prosecutors say the death penalty is called for because the March 2012 killings were premeditated. Thompson had driven non-stop for more than 24 hours from his home in rural Missouri to reach the couple's home in Prescott Valley, they argue.

But Thompson's attorneys plan to tell jurors that Thompson's beliefs explain away the marathon drive.

Thompson traveled to Arizona because his beliefs dictated he needed to be there to rescue his wife's nephew, the paper said.

Thompson believed the nephew's eternal soul was at risk because he was being treated with medicines for psychological issues - something the religion opposes, according to the report.

Thompson's attorneys have subpoenaed church records and they have asked for testimony from Scientology experts, including actress and ex-adherent Leah Remini.

Prosecutors are fighting defense efforts to call the experts to the stand.