While authorities have offered no suggestion the crimes are linked, Evan Ebel -- the man suspected of killing Clements -- was once a member of a white supremacist group and died in a shootout with sheriff's deputies in northern Texas on March 21.
Pete Schulte, a friend of the McLellands and a criminal defense attorney who has worked in the county, said other lawyers and public servants are nervous.
"Having that type of environment going on where people who are just doing their jobs (and) getting assassinated -- this is what this is, elected officials getting assassinated -- and that is sending a chill through the (legal) community and the community in general," he said.
He speculated that the killings were "personal."
"If this was a case that somebody was trying to change, they would have been going after witnesses and not the prosecuting attorney," Schulte said.
Michael Burns, McLelland's former law partner, said prosecutors from several counties have exchanged theories about what happened.
"But frankly, none of us know."
"We're used to hearing this sort of thing happening in Colombia or even Mexico. We're not used to hearing about judicial officials targeted in the United States. It's hard to say whether this is a local phenomenon that involves only one issue locally there, or whether this is the beginning of a trend. As a prosecutor, I can just tell you, we can't ignore it," Burns said.
"We're looking out the peephole when the doorbell rings now, where we maybe we weren't before," he said.
Filling a void
Kaufman County government offices will close Thursday to allow employees to attend a public memorial service in honor of McLelland and his wife, Wood said. A funeral will follow on Friday.
Brandi Fernandez, McLelland's first assistant district attorney, has been named to lead the office on an interim basis. She will fill that role until the governor appoints a successor.
But whoever becomes Kaufman County's next top prosecutor will have to grapple with the haunting past.
"I wonder if the governor is going to find anyone brave enough to take the job of district attorney," Kaufman city Mayor William Fortner told CNN.