The man who killed teenager Georgia Williams plotted the murder to give himself "sadistic pleasure", the judge said.
Mr Justice Wilkie said in sentencing: "You watched her die in circumstances where you could have saved her - and doing so was a central part of your pleasure...[You] then treated her body with contempt, dumping her in a remote area."
Continuing to address Jamie Reynolds, who stood head bowed and with his hands clasped behind his back, he said: "This is not a marginal or borderline case. I am in no doubt the seriousness of your offending, so a whole-of-life term is the starting point."
"I take very seriously the conclusion of (psychiatrist) Prof Paul Peckitt that you have the potential to become a serial killer," he added.
More top news
A man is risking his life to bring joy to children in Syria by smuggling toys into the war-torn country.
A dead whale - believed to be a minke whale - has washed up on a Devon beach between Dawlish and Dawlish Warren.
The trade secretary has said the UK "has a golden opportunity to forge a new role for ourselves in world" outside of the EU.