Urine bottles - strange but no proof of murder, also is there evidence these were there before the murder?
No, there isn't. Also, contrary to distorted media coverage, there were no bottles of urine found in the first raid on July 4th - the retention of urine didn't begin until after that raid and was explained later by a psychologist as a reaction to the trauma of not only finding Jodi's body, but the raid in which they tore his home apart and the relentless media attention thereafter.
In fact, the first bottles of urine were obtained in August, just before the second raid, unlawfully and by dishonest means by the FLO who entered Luke's room without another officer present (in spite of Dobbie's assurance that she would always have had "corroboration") - basically, that is entrapment. She had no legal right to be in Luke's room, alone, gathering items covertly.
Findlay argued that the bottles of urine had no relevant connection to the murder and should not be allowed as evidence - the Crown argued (and the court agreed) that although that was true, the evidence went towards showing that Luke was "not a normal teenager." By August, I'd agree - how many 14 year olds have seen what he saw that night and then had to go through massive media attention pointing to them as a murderer after having their entire house pulled apart?
Did it show him as "not normal" before the murder? Nope - like the tattoo and the Marilyn Manson CD, this was
after the murder. Put quite simply, if there had been bottles of urine in his room on July 4th, they'd have found them.