I haven't looked in to it but prima facie, it just sounds like a geocaching app.hey. anyone remember the tik thots who found the body in the suitcase? yeah. they were using an app called randonautica that sent them to the location. that app seems really weird. it picks a random location near you and apparently whatever you are looking for will be there in some way or another. some instances are obviously faked. but the body wasnt.
If anything the police should be able to get a warrant to get the account details of who ever marked that area (and maybe even visited using the app) and then see if any of these people were involved with the murder.