Celebrated Hollywood filmmaker Rob Reiner and his wife, producer Michele Singer Reiner, were found dead in their Brentwood, California, home on Sunday.
Their son Nick Reiner, 32, was arrested in Los Angeles on Sunday and has been booked on suspicion of murder. Police have said the couple were victims of homicide.
Rob Reiner, who was known for directing movies such as This is Spinal Tap and When Harry Met Sally, had two sons and a daughter with his wife of 36 years.
Here's what we know about Nick Reiner, their younger son, and the investigation so far.
The couple's youngest child, daughter Romy, found their bodies in their home in Brentwood, a celebrity enclave full of mansions, boutique shops and restaurants on the westside of Los Angeles, multiple sources confirmed to the BBC's US media partner CBS News.
