Kaufman, Texas (CNN) — A Texas community is on edge after a district attorney who said he would put away the “scum” who killed a colleague two months ago was shot to death alongside his wife in his home Saturday night.

Kaufman County Judge Bruce Wood said he thought there was a “strong connection” between the slayings of Mike and Cynthia McLelland and the shooting death of Kaufman County Assistant District Attorney Mark Hasse, who was killed on his way to work in January.

Hasse and McLelland “worked on similar cases very closely,” said Wood, the county’s top elected official.

And Kaufman Mayor William Fortner told CNN that he thought the men were targeted by people seeking revenge.

“That’s the logical conclusion, and I don’t have any information that directs me to think that’s the case, but that’s what you would assume under the circumstances, since they targeted two people from our prosecutors.”

Searching for leads in D.A.’s murder

The Kaufman County sheriff’s office, however, won’t officially say the killings are connected.

“I can’t say that,” Kaufman County Sheriff David Byrnes told reporters. “No, we have nothing indicating that for sure.”

Federal and state law enforcement descended rapidly on the crime scene to aid in the investigation.

Just two months ago, McLelland vowed to find the people who killed Hasse, one of his top deputies.

On Saturday, authorities found the McLellands’ bodies in their home in Kaufman County, east of Dallas.

“I don’t know of anyone who would want to cause him harm,” Fortner said. “As far as I could tell, he was doing a really good job as a district attorney.”

Fortner said he hoped the killer or killers were caught “before any more people are lost.”

Wood and McLelland last spoke last week.

“He never stated to me that he was worried,” Wood said. “But everybody that works in the courthouse has been on edge, but he never indicated any fear to me.”

Authorities are providing extra security for others, and the Kaufman County district attorney’s office will be closed on Monday.

“We are taking precautions to protect other elected officials in the county,” Byrnes told reporters Sunday. He declined to say what those measures were.