Lewis said he couldn't discuss the investigation in further detail, including how the couple died and whether authorities believe their deaths are linked to the Jan. 31 fatal shooting of Mark Hasse, an assistant Kaufman County district attorney.
Nor are they sure whether the deaths are related to the killing of Kaufman County Assistant District Attorney Mark Hasse, who was killed on his way to work in January.
The slayings came less than two weeks after Colorado's prison chief was shot to death at his front door, apparently by an ex-convict, and a couple of months after Kaufman County Assistant District Attorney Mark Hasse was killed in a parking lot a block from his courthouse office.