Detectives

are still focusing on the possible role of a Jonesboro man in the double

murder of David O. Mangham and Francis Michael Fowler at Mangham's home

back in May.

And several

witnesses in the case were compelled to testify before a Fayette County

Grand Jury last week, said Lt. Col. Bruce Jordan, director of investigations

for the Fayette County Sheriff's Department. Some of the witnesses were

uncooperative and one was caught in a lie, Jordan said.

The grand jury

has not, however, indicted anyone for the double homicide.

"We did

get some compelling testimony," Jordan said, adding that the investigation

into the murder would continue.

Jordan declined

to go into any detail about the testimony received by the grand jury.

Testimony given to grand juries is kept secret under Georgia law, and

members of the grand jury were warned not to discuss the case with anyone

else, Jordan said.

"The content

of their testimony is secret and cannot be divulged," Jordan said.

Detectives

are still focusing on Eddie Robbins, 48, who knew Mangham from high school,

Jordan said. Mangham and Fowler were found shot to death May 5 in Mangham's

home in the Princeton Chase subdivision off Ga. Highway 314 north. Both

men had been shot to death in two separate rooms of the house.

In July, detectives

sought the public's assistance in locating a handgun Robbins owned. It

is possible detectives wanted to examine the gun, a Colt .45 caliber pistol,

model 1911, to determine if it could be linked to the shooting.

"He probably

knows where it's at," Jordan said at the time, adding that Robbins

was not being named a suspect. "We are just looking for his gun."

Previously,

detectives dug up soil from his former Clayton County residence, in hopes

of finding a bullet or other evidence that could possibly tie Robbins

to the murder scene. Robbins reportedly had a habit of shooting his gun

in the air to celebrate New Year's Eve.

Detectives

and trustees from the Fayette County Jail spent days combing through the

soil looking for evidence, but detectives aren't commenting on what, if

anything, was found.

Jordan said

he didn't want to release many details because doing so might jeopardize

the investigation.

All of the

detectives at the sheriff's department were originally assigned to various

parts of the case, but now just one detective is assigned full-time to

the case, Det. Sgt. Tracey Carroll, Jordan said. Carroll is assisted by

Det. Ethan Harper and Jordan.