in 2010 when a tip came in linking the men.
smith said it is not easy to say why neither case has been solved.
"to put it in simple terms, sometimes people are witness to events or have knowledge of what truly occurred. however, for some reason, possibly out of fear, they are reluctant at the time to share the information," he said.
"we can only hope over time they feel the need to share the information to help clear their own minds.
"we do believe there are people out there in each of these cases who do have information that can be very helpful and hope that they will someday be willing to 