Ancient bones that that were recovered by an Essex Police Crime Scene Investigator date back to Roman Times.
The mystery was solved after the bones were discovered by builders working on a housing development on Debden Road in Saffron Walden.
It soon became clear they were human bones but no-one knew how old they were.
So CSI Hilary Miller took up the case and sent photos to experts at Dundee University.
The final step in solving the mystery saw the bones being examined by an archaeology expert from Essex County Council, who confirmed that the bones were human, ‘beyond living memory’.
As Roman and late Iron Age artefacts have previously been found on the opposite side of Debden Road, as well as the condition of the bones, it is thought that the remains may date back to Roman times.
They've now gone on display at Saffron Walden Museum.
Archaeologists are working to discover a lost village in the grounds of Wimpole Hall in Cambridgeshire. ITV Anglia reporter Stuart Leithes has been to meet them.