Police say Murray was a nurse at a correctional center and was having a relationship with an inmate.
A medical examiner's autopsy determined that Joshua Murray had died from antifreeze poisoning before the inferno destroyed the home.
Mugshot courtesy of Miller County Sheriff's Office.
Murray reported finding the home ablaze when she returned from taking the couple's 11-year-old son and two dogs to a McDonald's, a Miller County sheriff's detective wrote in a probable cause statement released last week.
According to a statement from the Miller County Sheriff's Office, Joshua Murray's body was discovered after investigators were called to a house fire in Iberia, Missouri on December 11 and found him dead inside the home. She was being held at the Miller County Adult Detention Center on a $750,000 bond. Murray allegedly told investigators that by the time she came back from the fast-food restaurant, the smoke was too thick for her to go inside and try to rescue her husband.
However, court documents revealed a McDonald's sandwich found on the kitchen counter inside the home and a McDonald's food bag was in the trash.
Police discovered evidence that Murray had allegedly become romantically involved with an inmate: In phone conversations recorded by the prison, Murray allegedly said she wanted to marry the inmate, according to the statement.
Claypool and another man were convicted in the 2000 killing of 72-year-old Donald Hardwick. On Thursday, a woman was arrested for allegedly poisoning her husband, setting him on fire so she could marry an inmate. Hardwick, who couldn't walk without using a walker, won a $1.7 million Missouri Lottery jackpot in 1998.
In addition to the murder charge, Murray is also charged with armed criminal action.
She added that she could marry Claypool because Joshua was dead and "out of the picture", the report said. She is scheduled for a bond reduction hearing February 13.