David B mentions in one of his statements that Bamber was asked about the sights and silencer back at WHF at his first interview.
https://jeremybamberforum.co.uk/index.php/topic,774.msg20379.html#msg20379
I don't know what is hard for people to understand, it's there for everyone to see, questions were first asked about the sights and silencer by the POLICE on the day of the murders on the 7th, it's backed up by two witnesses. He would have been asked about these because he told the Police he had loaded the rifle to go shoot Bunnies, yet the rifle had been found without sights and silencer. He then makes another statement on the 8th to say the sights and silencer wasn't on the rifle. Ann would have told the rest of the family what she heard and the fact the rifle was minus sights and silencer ETC.
It must have been of concern to Taff at the same tome, because this is one off the questions he wanted to ask Bamber when he went with Stan to interview him at 7.30 pm on the 9th.