NASHVILLE, Feb. 13 (UPI) -- The son-in-law of a Tennessee couple killed in a package-bomb explosion was arrested Thursday after being indicted for murder, authorities said.
Tennessee Bureau of Investigation Director Mark Gwyn told reporters Richard Parker, 49, was taken into custody at his home and charged with two counts of felony first-degree murder and two counts of premeditated murder, the Tennessean reported. He also is charged with a single count of unlawful possession of an illegal weapon.
Parker was being held on $1 million bond in the Wilson County Jail, the Nashville newspaper said.
Parker, who has a previous conviction for arson in Giles County, is charged in the slayings of Jon Setzer, 74, a retired lawyer, and Marion Setzer, 72, of Lebanon, east of Nashville. The husband died in Monday's mail bombing and the wife succumbed to her injuries Wednesday, authorities said.
Authorities said a note had been recovered they believed was attached to the bomb. They declined to release its message.
Setzer picked up the package containing the bomb from a mailbox about 200 yards from the couple's home, officials said. It exploded as he returned to the house.
Authorities say they were investigating whether the package was delivered by a U.S. Postal Service carrier or a private delivery service.