Sorry, what i meant about the t shirt, is that he may have chosen it because he was going to hang out with another fan of that or another similar band. Young people tend to wear what their friends are wearing or to impress whomever they are meeting. If for example Andrew wore a " gaming" t shirt, i would suspect that he was going to something/ someone associated with that world, ect. He may have pulled on any old t shirt, but his actions seemed purposeful and so i extended that to include what he chose to wear on the day he disappeared. speculation, imo.