A man who plied his girlfriend with a lethal dose of cocaine before strangling her on the night she tried to leave him has been jailed for at least 35 years.
Kieron Goodwin, 33, was found guilty last month of murdering 29-year-old Olivia Wood at his flat in Frome, Somerset, on 30 July last year.
Goodwin had quickly become controlling of Ms Wood during their three-month relationship, including forcing her to take drugs, perform sex acts on camera for other men and sleep with a stranger.
Jailing Goodwin at Bristol Crown Court, Judge Martin Picton described him as a "truly evil individual".
On the night Ms Wood died, she had packed her belongings into a suitcase and rucksack, suggesting she was preparing to leave him.
In a victim impact statement, Ms Wood's mother Astrid described Olivia as "my sunshine, my love, my heart".
"I miss her voice, her laugh, her warmth, her stories from work, her experiences with the little animals that she loved so much. There was always a beetle or a bumblebee to rescue," she said.
"I feel sick, I'm limping inside with pain. I gave life to Olivia and now one person on this earth was allowed to take her life away."
Goodwin had admitted coercively controlling Ms Wood but denied her murder.
He has never given an explanation for her death, and did not give evidence at trial.
Goodwin was also sentenced for a string of offences against three former partners, including forcing them to take drugs and sleep with strangers against their will.
Ms Wood, an ecologist based in Liverpool, never formally moved in with Goodwin, but a spent a lot of time with him in Frome.
She never spoke to anyone about the situation she was in, but notes on her phone revealed that she was deeply unhappy.
