The lack of rigor mortis and livor mortis on Sheila's body when the crime scene photos were taken rules Jeremy out period. Even more so if you want to argue he walked home.
See above. I'm intrigued by Adam and other guilters' fascination with this bike. To me, a fit 24 year old man can run that distance in, say, 30 minutes. Bear in mind he knows the land, and maybe he planned it all out. I think I now know why they need him to have used the bike and I think there's another problem with the prosecution case.