A SKULL found by the river in Barford dates back to Medieval times.
Radiocarbon dating was used to identify how old the partial human skull is, which was found on May 5.
And specialists have discovered it is from around 960-1150 AD.
Det Chf Insp Caroline Corfield said: “Specialist tests have now confirmed the skull – which was found by a member of the public – is from the Medieval period.
“When the skull was originally discovered, we are aware there was some speculation that it could have been linked to a number of ongoing regional investigations.
“While we always maintained an open mind, it is now clear this is not the case and any families who were awaiting an update have been informed.”
The skull will now be used for forensic training purposes.