The incident occurred in the town of Langenthal on March 10th 2012 when the convicted man in testimony earlier this week said he called an escort agency with the goal of raping the 44-year-old blonde, according to media reports.
Forensic experts said the victim died either from being choked or from a stone that the murderer shoved down her throat, the SDA news agency said.
The culprit tried to rape the woman and placed various objects into body orifices before carrying the lifeless body to a sports centre, according to earlier testimony.
He stole money from the woman, dumped the body and drove her car away from the scene.
“I just could not stop,” the defendant, who admitted to ingesting cocaine before the attack, is quoted as testifying, SDA said.
“It was like a movie I could not stop.”
Prosecutor Marcel Meier called the murder like an act that “could be out of a horror shocker,” SDA said.
Chief Justice Samuel Schmid said the act was marked by particular ruthlessness and selfish gratification, according to the agency.
“One could speak of bloodlust.”
The judge ordered the convicted man to receive therapy as part of the sentence.