I would like to see some evidence of this demonstrated. I feel a large majority of high-profile cases that went unsolved for a long time most often hinged on incompetence or negligence rather than lack of information sharing.

Also, once crime does cross state lines the local FBI gets involved and they have a lot more resources than a small-town police force

> often hinged on incompetence or negligence rather than lack of information sharing.

Or just technology. Almost every “50 year old cold case solved” I see is because advancements in DNA processing .