(NewsNation) — Rob Reiner’s daughter is speaking out after the tragic deaths of her parents.

Tracy Reiner, who is Rob Reiner’s adopted daughter from his previous marriage to Penny Marshall, told NBC News that she’s in disbelief that her father and stepmother, Michele Singer, were killed.

The Hollywood director and actor and Singer were found dead inside their Brentwood, California home in an apparent homicide on Sunday, KTLA has confirmed.  

Their son, Nick Reiner, has been arrested in connection with their deaths. He is currently being held on $4 million bail.

Before her brother’s arrest, Tracy Reiner told NBC News, “I came from the greatest family ever. I don’t know what to say. I’m in shock.”

Firefighters reportedly found Rob, 78, and Michele, 68, inside the home suffering from stab wounds.

In addition to Nick Reiner, Singer and Rob Reiner shared kids Romy Reiner and Jake Reiner.