Yesterday, I read about a 30 year unsolved case. I think the family should be allowed to go over every note, with a fine tooth comb. using the integrity of the investigation, as an excuse, IMO, is just a cop out. The family could study what LE has, & maybe see something obvious, that LE missed. Nobody, knows the victim, better than his loved ones. But, how long is too long? 30 years, for sure, but how much less than 10 years? I guess if I was in that situation, there would come a time, when I'd accept death, & then I'd want the murder solved. less than 5 years. MOO.