How is it relevant if they were taken before BL went missing? JI is guilty of being at a party with alcohol now? JI is guilty of enjoying himself at a party now? JI is guilty of drinking all that alcohol on the table despite the fact there are no pics of him drinking nor are there pics that depict how many are actually there, nor is there any context to any of the pics?
If the pictures were in his distant past, I would find them irrelevant. If the pictures stood by themselves without any public statements by the parents about drinking, black out like periods, and how alcohol doesn't change people, I would likely find them irrelevant. Given the parents attitudes towards alcohol in their own words and especially their denials of it having any bearing in regard to BL having disappeared into the ethers, I think these pictures are relevant and on the table for discussion.