Rob Reiner's close friends, including Billy Crystal and Albert Brooks, are showing up to be "fiercely" protective of the late director's kids Romy and Jake in the wake of the murders, a source tells PEOPLE.

Rob Reiner and Michele Singer’s adult children are doing the best that they can, given the tragic circumstances. The late couple’s son, Jake, 34, and Romy, 28, have had to face the unfathomable this week after their brother Nick,

Rob and Michele Reiner's kids Jake and Romy spoke out for the first time following their parents' homicide. The siblings released a statement on Wednesday, December 17, about the deaths, which occurred on Sunday,

Rob Reiner and Michele Singer Reiner's bodies were found by their daughter Romy in their Los Angeles home on Dec. 14, according to multiple sources. The couple’s son Nick has been arrested in connection with the apparent double homicide.

The world is still mourning the tragic loss of Rob Reiner and his wife, Michele Reiner. It was the couple’s youngest child, Romy Reiner, who alerted the police about a mishap at her parents’ home. Police found fatal stab wounds on the deceased couple and soon charged the couple’s 32-year-old son, Nick, with two counts of first-degree murder.

Rob Reiner and his wife Michele Singer enjoyed a blissful family holiday with their daughter Romy just weeks before she found their dead bodies at home.