The former justice of the peace in Kaufman County was charged with making a "terroristic threat," authorities said Saturday.
Eric Williams was admitted to the Kaufman County Jail early Saturday morning, jail records show. He is scheduled to go in front of a judge Saturday morning, a Kaufman County Jail spokesperson said.
Federal and local authorities had searched Williams' home on Friday as part of an investigation into the deaths of District Attorney Mike McLelland and his wife, Cynthia, whose bodies were found March 30 in their home. In late January, assistant district attorney Mark Hasse was fatally shot as he was leaving work in Kaufman, about 30 miles southeast of Dallas.
Williams, 46, hasn't been named a suspect in any of the deaths.
Williams was prosecuted and convicted of theft last year by the district attorney's office and lost his position and license to practice law.
Williams has denied any role in the murders.
On Friday, CBS News learned authorities executed a search warrant at Williams' home.
On "CBS This Morning: Saturday," CBS News senior correspondent John Miller reported that the home of Williams' in-laws was also searched. Miller also said he's spoken informally with Williams.
"He says, 'I've cooperated every turn, I've given them their tests, I've turned over my cell phones,'" Miller said, explaining that Williams told him, "'These prosecutors were doing their job. I have no grudge about my case.'"
A listed phone number for Williams went unanswered Friday afternoon. But his attorney, David Sergi, released a statement Friday saying his client "has cooperated with law enforcement and vigorously denies any and all allegations."
"He wishes simply to get on with his life and hopes that the perpetrators are brought to justice," Sergi said.
Authorities have released little information about the case except to say they continue to follow leads, including possible ties to a white supremacist gang.
One month before Hasse's death, the Texas Department of Public Safety issued a warning to authorities statewide that the Aryan Brotherhood of Texas could retaliate for an October indictment that targeted some of its leaders. McLelland's office was involved in that investigation.