I’m not sure what he’s expected to admit to ‘knowing’. How can he know if or when a kidnapping took place as he wasn’t there? This was only a hearing and he was there to testify about the cellphone data. Later during the trial it will be up to the prosecution to present a theory to the jury, linking all the facts together to demonstrate why RA is guilty of the murders. State witnesses generally do not take the witness stand and testify even during a trial, one after another about what they ‘believe’ or think they know. Those are opinions, not facts. The jury will be instructed to only consider ‘the facts’. JMO