Monday sheriff's deputies discovered the bodies of a male and female inside a home on 420 County Road 4683.
Cass County Captain Scott Sartain says the victims are Doyle Pollard, 49 and Dyrika Jones, 42. Sartain says Pollard and Jones lived together and were in a relationship.
Both bodies have been sent to Dallas for an autopsy.
Detectives are interviewing a person of interest but they are not considered a suspect at this time.
Texas Rangers are helping with the investigation.
NBC 6 will have the latest developments tonight on our 5 p.m. newscast.