The police did speak to Sean about the blood on the guitar and they were satisfied with his reason for it being there (I read it was from an injury he had earlier). It's 5am here and I'll try and find the link when I've had some sleep. If Sean was involved then the police wouldn't have any reason to hide that fact. Actually, we know it would have been better for the police if it were a tourist who had committed the murders.
The DNA taken from Hannah was found not to belong to Sean. I wonder if police
I'd suggest that the fact that Sean DIDN'T clean the blood off his guitar is more a sign that he wasn't involved in the crime. Afterall, wouldn't that be the first thing you did, get rid of any evidence? You wouldn't carry the guitar around with you and to a recorded interview as well. Assuming he was thinking logically of course. He'd only need a cloth with some soap on to get it off (well the appearence of blood off it anyway).
The DNA taken from Hannah was found not to belong to Sean. I wonder if police
I'd suggest that the fact that Sean DIDN'T clean the blood off his guitar is more a sign that he wasn't involved in the crime. Afterall, wouldn't that be the first thing you did, get rid of any evidence? You wouldn't carry the guitar around with you and to a recorded interview as well. Assuming he was thinking logically of course. He'd only need a cloth with some soap on to get it off (well the appearence of blood off it anyway).