The murderer of a teenager who was buried in a makeshift grave is still at large while his friend was jailed over the killing, a court has heard.
Kieran Williams, 18, was stabbed more than 20 times and his body was dumped in a makeshift grave near the River Wear in Sunderland.
His friends Louis Hackett and Ben Cook were cleared of murder, but Hackett was convicted of manslaughter.