The outskirts of Karrakatta are quite spread out and not as well maintained as the more central part of the cemetery. Visiting recently reinforced the idea that it could be a possible location. I'm sure I read that back in 96 you could drive down into the cemetery too. It's not nice to think about but going by his creepy social media profile and his interests in dark and twisted stories etc, not to mention his horrific crimes he's accused of, I wouldn't put it past him. Maybe we will hear more throughout the case of someone of the accused's appearance seen lurking in the area?