British screenwriter Simon Monjack, 39, died at his home on Sunday, according to Los Angeles Police Sgt. Louie Lozano. The cause of death is unknown.
"We have detectives at scene," Lozano told the Times. "They are conducting their investigation. Once we have further information, we will provide it."
The Los Angeles Fire Department responded to a 911 call for an "unspecified medical aid request" Sunday night, according to spokesman Brian Humphrey. Fire Department workers provided medical attention, but Monjack was pronounced dead late Sunday at the Hollywood police station, police told the Times.
Murphy died Dec. 20 at age 32 after collapsing in her bathroom. Authorities recovered a large amount of prescription drugs at Murphy's home, some of which were prescribed to her mother, Sharon, and Monjack, according to the autopsy report. Monjack and Sharon Murphy previously denied that Murphy abused illegal drugs.
In February, the Los Angeles County Coroner's Office ruled Murphy's death accidental and said it was caused by pneumonia with multiple drug intoxication and anemia as contributing factors. An autopsy later that month showed the 32-year-old actress had no signs of illegal drug use at the time of her death.
Monjack's credits include the film Factory Girlstarring Sienna Miller and Two Days, Nine Lives. Murphy was best known for her roles in Clueless, Girl, Interrupted, Don't Say a Word, and 8 Mile. She also lent her voice to the show King of the Hill for 12 years as Luanne Platter.