Remains were found in 2010.
A man arrested in connection with a 15-year murder investigation following the search of a home in the midlands, has been released without charge.
The remains of Kevin Fetherston were discovered in the Dublin Mountains in January 2010, after he was last seen leaving his home in Tallaght.
A man in his 40s was questioned yesterday in connection with the case, but has since been released without charge.
A file is to be prepared for the DPP.