Authorities in Texas were investigating the deaths of a district attorney and his wife on Saturday, in the same county where an assistant district attorney was shot dead outside a courthouse in January.
The deaths of Kaufman County Criminal District Attorney Mike McLelland and his wife Cynthia were reported by the Kaufman County Sheriff's Office late on Saturday.
News reports said they were shot to death at their home.
"We are investigating the deaths of the Kaufman County district attorney and his wife," said Kaufman County Sheriff's Office spokesman Lieutenant Justin Lewis.
Lewis said the investigation was at a preliminary stage and he had no further information.
The deaths follow the January slaying of Kaufman County Assistant District Attorney Mark Hasse, who was shot and killed as he walked from his car to a Dallas-area courthouse.
The Dallas Morning News, citing unnamed sources, said McLelland and his wife were found shot at their home.
McLelland, a U.S. Army veteran, had five children including a son who is an officer with the Dallas police department, according to a biography on the county website.
Authorities have made no arrests in the Hasse's killing. McLelland had vowed to bring his killer to justice.
He was shot to death the same day the U.S. Department of Justice released a statement saying the Kaufman County District Attorney's Office was involved in a racketeering case against the Aryan Brotherhood white supremacist group.
Earlier this month, the Hasse slaying case took a new turn when the Kaufman police chief said the FBI was looking for any possible link between Hasse's death and the March 19 shooting death of Colorado prisons chief Tom Clements.
Evan Spencer Ebel, 28, a Colorado prison parolee suspected of killing Clements, died in a shootout with police in Decatur, Texas, on March 21. Ebel was a member of a white supremacist prison gang called the 211 Crew and had a swastika tattoo, prison records indicate.
Kaufman County is in the east of metropolitan Dallas-Fort Worth area.