Larry David and Billy Crystal are absolutely devastated over the death of their good friend, Rob Reiner. As we've been reporting, the legendary director and his wife, Michele Singer Reiner, were tragically murdered in their California home over the weekend. More reports have been coming out about the horrific stabbings, with their son Nick Reiner even being arrested and put in custody. So awful. On Sunday night, following the slayings, a neighbor spotted Rob's longtime friends and colleagues Larry and Billy at the scene of the crime, per ABC7. The When Harry Met Sally...