Law enforcement sources say a friend of Nick Reiner was present at the Los Angeles residence where his parents, filmmaker Rob Reiner and Michele Singer, were found fatally stabbed, adding a key detail as investigators continue to piece together the circumstances of the double homicide.
Authorities discovered the bodies inside the home after responding to a welfare check, and Nick Reiner was subsequently taken into custody in connection with the deaths. Officials have now confirmed that another individual was in the house at the time of the incident, though the role of that person remains under active investigation.
Detectives are interviewing the friend as part of the ongoing inquiry, seeking to clarify the sequence of events leading up to and during the fatal encounter. No charges have been announced against the accompanying individual as authorities continue to determine their involvement and gather evidence.
Investigators are also reviewing forensic evidence and other details from the scene to build a comprehensive timeline. Police have not released a motive, stressing that multiple lines of inquiry remain open.
The case has drawn widespread public attention, and authorities say they will provide further updates as the investigation progresses and more information becomes available.