Jesse Shane Kempson, 28, killed backpacker Grace Millane in December 2018
He argued Ms Millane, 21, died accidentally as the pair engaged in rough sex
In November a jury trial rejected that argument and found Kempson guilty
Kempson challenged the sentence and conviction but that has been rejected
He raped another woman in a motel room just months before Grace was killed
Kempson also sexually violated and seriously assaulted a former girlfriend