She said the investigation involves a lot of legwork on the part of agents, primarily checking out the more than 560 leads they have received in the case.
More than half of those leads have been checked out, she said, noting that new leads are now less numerous and less frequent.
Brown said the OSBI is optimistic that the case eventually will be solved.
"We have some really good leads now that are taking us to new directions," Brown said without elaborating.
In addition to checking on leads, she said, agents have now questioned more than 100 people — with many more to go — as they hunt for suspects. More than half of the witnesses were from the Weleetka area, she said.
Also, Brown noted, that of those questioned, dozens of polygraph tests have been administered to clear them of any complicity in the killings.
Brown said dozens of DNA samples were collected from those questioned — far more than the number of lie-detector tests that were given.
She said the OSBI is employing new, innovative investigative techniques in its hunt for the slayers. However, Brown would not say what the techniques were because the disclosure "would reveal some of the evidence we have."
The OSBI has remained mum on what its full range of evidence is in the case.
What is known is that authorities know what caliber of bullets and types of guns were used in the killings, but they're not divulging that information.
They've also recovered bullet casings from the scene, but they remain close-mouthed on whether the casings have yielded fingerprints.
Copyright 2008 The Associated Press.