Additional charges have been filed against an Iberia woman already charged with the murder of her husband in December.
Miller County prosecutors on Monday filed charges of second-degree arson and tampering with physical evidence against Amy Murray, 40. Murray was charged last week with first-degree murder and armed criminal action for the death of her husband, Joshua Murray, who died in a fire at the couple's home.
Joshua's body was found after the fire Dec. 11. The Missouri State Fire Marshal's Office and the Miller County Sheriff's Department determined the fire was a result of arson. It originated in the master bedroom, and an accelerant was used to start the fire.
An autopsy concluded Joshua had been dead prior to the fire and that he had died of poisoning, with indications he had been poisoned with antifreeze.
Cellphone records indicate Miller was at the residence a half-hour before the fire was reported to 911, according to a Miller County Sheriff's Department probable cause statement.
She later told investigators she had left the residence with her 11-year-old son and two dogs and drove to McDonald's in Osage Beach.
Murray had been employed as a nurse at the Jefferson City Correctional Center, where she had developed a romantic relationship with an inmate, according to Sheriff's Department reports.
After listening to recordings of phone conversations at the prison, investigators identified the inmate as Eugene Claypool, according to the probable cause statement. Murray told Claypool she didn't want to be around her husband and wanted to divorce him. She later told Claypool they could get married because her husband was dead. The two also talked about getting Claypool an attorney so he could be released from prison early.
Records from the Missouri Department of Corrections show Claypool is serving a life sentence for second-degree murder.
Murray worked at the prison through Corizon Health, a private company that provides health care at the state's prisons, according to the Associated Press. Spokeswoman Martha Harbin told the AP that Murray had been fired from the company.
Claypool and another man pleaded guilty to killing 72-year-old Donald Hardwick, who was attacked in his home on Christmas Day in 2000, according to the AP. Hardwick won a $1.7 million Missouri Lottery jackpot in 1998, and investigators said Claypool and his co-defendant targeted Hardwick believing he had $10,000 stashed in his Springfield home.