Given the "Denver" connection and the cryptic naming style, files like this are often found in:
: This is a common compression of "NightsofDenver" or "NotesofDenver." JACROSntsofDnvr rar
: This could be a shorthand for "Jack Ros..." (a name) or an acronym for a specific organization or project. Given the "Denver" connection and the cryptic naming
Encrypted files or "leaked" archives are frequently used as plot devices where players must find a password to unlock the story. JACROSntsofDnvr rar
If this is from a specific forum (like Reddit's r/Denver or r/UnsolvedMysteries), it might refer to a specific set of "leaked" notes regarding local urban legends.