[VIDEO] Wife of lawyer dies & Son-in-Law Arrested in Tenn. Package Bomb Deaths

John Stetzer, 74, picked up the package from his mailbox Monday. As he walked back to the house, it exploded — killing him and critically wounding his wife, Marion. She died of her injuries Wednesday.

The son-in-law of the Tennessee couple killed when a package exploded at their home has been charged with first-degree murder in their deaths.

State Fire Marshal’s Office spokeswoman Katelyn Abernathy said Richard Parker is also charged with unlawful possession of a prohibited weapon.

Reached by telephone the day before the arrest Thursday, Parker declined to talk about the deaths of Jon and Marion Setzer with The Associated Press. Parker ran Legacy Restorations, a business that specializes in historic restorations, according to its website. His house was just behind the Setzers’ in a semi-rural area of Lebanon, about 40 minutes east of Nashville.

Parker was convicted of arson in 1993 in Giles County and sentenced to four months of probation, according to records.