Several police task forces are exploring potential motives, including a connection to the Aryan Brotherhood, a racist prison gang whose members McLelland helped prosecute, or drug cartels.
A major illegal drug route runs through Kaufman County, or the possibility the killings Saturday, and that of prosecutor Hasse two months ago, may have been the work of a lone killer harboring a grudge.
But friend of McLelland's, Anderson County District Attorney Doug Lowe said there's no way to tell yet who may have had a motive. That the answer is likely hidden somewhere in the district attorney's files
"I'm not discounting ability of AB or Mexican cartel to pull off these things, but I think you have to start without preconceived notions at where the people are that they made mad," said Lowe.
Investigators have been questioning prosecuted by both men, but so far have not named any suspects or confirmed any connection to the murders.
The investigation is leaving residents and officials on edge.
"Just worried, you know, about the next person that steps up there to that position," said Dorothy McPhearson. "Dangerous it sounds like now."
"Everybody should be worried about everything. I just pray for everything to be all right," said Lucille Malone.
Local 2 was told Tuesday to expect written updates from the Sheriff's Department on the investigation, but not when those might be coming.