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Gregg McCrary, former FBI profiler from Virginia, said police obviously felt releasing the information about the cross wouldn't hurt their investigation.
"It's one of those things, you are always trying to weigh the value of releasing information and data to the public. You have to keep some stuff in house to filter out suspects."
McCrary said he is sure that the authorities conducted their own investigation into the cross its origin, the significance of the marks and who could have owned one.
" I assume they have done all of that and it hasn't led them to where they want to be, and now they are eliciting help from the public," he said.
That could also have a backlash, he said. In cases where such little information has been released, people sometimes tend to overinterpret everything, he said.
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