A Los Angeles woman who worked as a business manager for the Kardashians and other celebrities was brutally murdered by her boyfriend last week, police said.

Angela Kukawski, 55, was found dead in a car in Simi Valley, just northwest of Los Angeles, on Dec. 23, Los Angeles police said Wednesday in a press release.

Her boyfriend Jason Barker, 49, was arrested the same day and charged with her murder.

Cops also charged Barker with torture, saying he caused “cruel and extreme pain and suffering for the purpose of revenge, extortion, persuasion and for a sadistic purpose, (to) inflict great bodily injury,” the Los Angeles Times reported.

Police said Barker used a knife and a gun in the attack, according to the L.A. Times. Kukawski died from blunt force injuries to her head and from strangulation, a local coroner determined.

Kukawski was first reported missing on Dec. 22 from her home in the Sherman Oaks neighborhood of Los Angeles, about 20 miles southeast of where her body was found in Simi Valley. Cops said Barker killed her at the Sherman Oaks home and then put her body in the car and drove to Simi Valley, where he parked the vehicle on a street.

Barker was being held on $3 million bail as of Wednesday night.

Kukawski worked with several high-profile clients, including the Kardashians, Nicki Minaj, Kanye West and Offset, according to Variety. She also worked with Tupac’s estate.

In an Instagram post, Minaj described her as the “Hardest working, most reliable, sweetest person you could ever know. You didn’t deserve this, Angela. My heart is breaking for your children. Rest In Peace.”