According to Los Angeles Police Department records, Nick Reiner is being held on $4 million bail.

The couple allegedly had their throats slit after a heated argument with a relative, understood to be Nick, turned deadly at their $13.5million LA mansion on Sunday afternoon.

Hollywood director Rob Reiner’s son, Nick Reiner, was arrested and charged with murder after the deaths of the writer-director and his wife, a Los Angeles law enforcement official said Monday. Reiner…

The police said they were seeking to interview "every family member" of the actor-director and his wife Michele Singer Reiner after their bodies were discovered in their home.