A friend of mine was cleaning up some archives in a boating group I’m associated with. Found a GPS, and somehow tied its ownership to someone we tangentially knew...who had been questioned in the disappearance of an employee of his.
Local investigators were called, detectives interviewed my friend and took the GPS. They stated they had found documentation and accessories for that model of the GPS on the suspect’s boat - and had been looking for the unit itself. Further investigation showed stored prior tracks on the GPS that coaborated other evidence, and the suspect became a defendant and was eventually convicted of murder.