Elena Salvoni

The Hollywood director and his wife were knifed to death between Saturday night and 3.30pm Sunday afternoon, when their bodies were reportedly discovered by their daughter Romy.

At 9pm Sunday, cops swooped on a Metro station near the University of Southern California, a 20-minute drive from the hotel Nick had checked into around 4am that day.

Video exclusively obtained by the Daily Mail shows police cars with flashing lights descend on a busy intersection in downtown Los Angeles about 15 miles from the Reiner family's home.

At 9pm Sunday, cops swooped on a Metro station near the University of Southern California, a 20-minute drive from the hotel Nick had checked into around 4am that day.

Rob Reiner's son checked into room 207 at The Pierside Santa Monica around 4am on Sunday.

Nick Reiner's two siblings Jake and Romy have released a statement, saying 'words cannot even begin to describe the unimaginable pain we are experiencing every moment of the day'.

Nick Reiner's two siblings Jake and Romy have released a statement, saying 'words cannot even begin to describe the unimaginable pain we are experiencing every moment of the day'.

The 32-year-old was shackled and wearing an anti-suicide smock as he sat hunched during the three-minute hearing at the criminal court in downtown Los Angeles.

Between Nick's appearance at Conan O'Brien's party and his arrest for his parents' murders some 24 hours later are a concerning number of missing hours.

Between Nick's appearance at Conan O'Brien's party and his arrest for his parents' murders some 24 hours later are a concerning number of missing hours.