Restaurant worker Shahidul Ahmed has been found guilty of the murder of city teenager Rachel Manning in 2000.
Rachel’s boyfriend, Barri White, was convicted in 2002 of murdering the 19-year-old and dumping her body at Woburn golf course.
He was freed six years later on appeal and his conviction was quashed after a full retrial.
Two years after Mr White’s acquittal, police arrested 41-year-old Shahidul Ahmed on an unrelated matter.
His DNA proved a match for samples taken from the car steering lock used to batter Rachel around the head after she was killed.
Ahmed, of Bletchley, first stood trial in February this year but the case collapsed after the jury was unable to reach a verdict.
The retrial started in August with an almost identical case from the prosecution. Ahmed pleaded not guilty.
Ahmed has been sentenced to life with a minimum of 17 years.