Do you think the crime was premeditated, whoever the perpetrator?
In some respects, yes - in others, no!
I think the killer had to be armed with a substantial weapon and the mental capacity to carry out such an attack. I don't think it's a "crime of passion" type murder, more likely someone with an intention to attack and kill already in place (and perhaps some mental construct of how those would be carried out).
I'd say the killer had to have knowledge of the area and potential escape routes in particular, although it was still a risky attack, in terms of being caught.
I don't know, however, that this was a premeditated attack with Jodi, specifically, as the target. It's possible she happened upon someone already "looking for" a victim (in however loose a sense that can be interpreted - either someone set out with an intention to kill and wanted a particular "type" of victim, or someone had been harbouring an intention to kill for some time and seeing or talking to Jodi triggered that intention into action).
But then there's the mystery of how Jodi came to be behind the wall. She wouldn't have gone there voluntarily with someone she'd never met before, I'm pretty sure about that. She may have decided to cut through the woodland strip, rather than walking down the path and come into contact with her attacker that way. But I think it's highly unlikely she was attacked on the path and then bundled or coerced through the V Break - as risky as the actual attack was, taking the chance of attacking Jodi out in the open on the path and then having to get her over the wall into the woodland strip would seem to be a step too far, in terms of the chances of being caught.
So if Jodi was already in the woodland strip, entirely by chance, then the attack wasn't premeditated in terms of Jodi being the intended victim.
There's only really one scenario where it could have been premeditated with Jodi as the intended victim and that is if the murderer knew that Jodi was going to be on the path at a particular time and was confident he could get her into the woodland strip without a fuss, or that she was going to already be in the woodland strip at a particular time.
We know the "grounding" story is incorrect so in reality, the murder could only have been premeditated, in this context, by someone who knew when she left, or would be leaving, her home and who also knew exactly where she would be going.
The argument from there is bound to go .... and the only person who knew that was Luke. But there's no proof that that's true. Since she wasn't grounded, we don't know if Jodi had arranged to meet someone on her way to see Luke. The timings for both the grounding and non grounding story rule Luke out - if Jodi left at 4.50pm, there's not enough time for Luke to have been the person "seen" by Andrina Bryson at 4.49 - 4.54. If she left just after 5pm (re the witnesses who said they saw her at 5.05pm), the murder didn't happen at 5.15pm, so Luke can't have been the killer.
So, if it was truly premeditated, it was carried out by someone who knew what time Jodi left (or was leaving) and where she would be going, and that someone was not Luke Mitchell.