Nick Reiner, the 32-year-old son of legendary Hollywood director Rob Reiner, is expected to appear in court on Tuesday after being arrested in connection with the deaths of his parents.

Authorities say Nick Reiner will be formally charged with murder during an arraignment at a downtown Los Angeles courthouse. His arrest followed the discovery of the bodies of his father, Rob Reiner, 78, and his mother, Michele Singer Reiner, 70, inside their Brentwood home on Sunday.

The couple were reportedly stabbed to death in what investigators are treating as a brutal double homicide, a development that has sent shockwaves through the entertainment industry and among fans worldwide.

U.S. media reports indicate that Nick Reiner, who is said to have struggled with substance abuse since his teenage years, allegedly had a heated argument with his parents at a high-profile Hollywood party on Saturday night, hours before the killings. Police have not yet publicly confirmed a motive.

The case remains under investigation as prosecutors prepare to outline the charges in court.