1991 cold case murder suspect pleads guilty, sentenced

On February 16, 1991, the Lubbock Fire Department responded to a structure fire at 3404 37th Street here in Lubbock, TX. One deceased male was located inside the residence and later identified as John Duncan. During the investigation the manner of death was ruled a homicide.

During the homicide investigation it was found that Joseph Jeffrey was employed by the victim. As additional evidence and information was obtained, Mr. Jeffrey became a suspect in the case.

An extensive investigation was conducted, but failed to yield sufficient probable cause to charge Mr. Jeffrey with the homicide. The case was rendered “cold” but regularly reviewed since then by LPD Homicide Detectives for additional evidence and leads.

In July, 2014, Mr. Jeffrey was serving a life sentence for an unrelated offense in a south Texas prison. Mr. Jeffrey made contact with one of the original LPD Detectives from the case and admitted to killing Mr. Duncan back in 1991. Mr. Jeffrey was brought to the Lubbock County Jail, where he was provided a court-appointed attorney.

On August 27, 2014, Mr. Jeffrey was interviewed by LPD Detectives. Mr. Jeffrey's statement contained specific details about the homicide and crime scene, which were corroborated by existing evidence and by law enforcement. The case was then presented to the District Attorney's office.

This morning, Mr. Jeffrey pled guilty in open court to the homicide in 1991 and accepted the 40 year sentence recommended by the Criminal District Attorney's Office.