Final hours of Jayden Parkinson's life on CCTV
24 July 2014 Last updated at 18:51 BST
Jayden Parkinson and Ben Blakeley were caught on CCTV cameras in the hours before he killed the pregnant teenager.
The pair were seen at Oxford train station last December before they travelled to Didcot - it was the last time the 17-year-old was seen alive.
Blakeley strangled her and buried her body in his uncle's grave in Great Western Cemetery at All Saints' Church in Didcot.
Det Ch Supt Andrew Murray, from Thames Valley Police, said the force had never seen a case like it before.
Blakeley was found guilty of her murder at Oxford Crown Court.
Duncan Kennedy reports.