I see so much speculation on whether Kenzie knew her murderer prior to meeting him at Hatch Park. We know that he knew of her, not that he knew her. How or why he knew her, and why she met him at the park in the middle of the night, should not be in question. I think that much is obvious given her lifestyle choices. It was an arrangement. If she had met with him at some time in the past, she would have known where he lived and that he lived between her home and the airport. She would have known that there was no reason to go to Hatch Park when travelling from the airport to his house.
Everything suggests that she had not met him before, that this was a first meeting and that it was a transaction. He appears to be a sexual predator (prior rape complaint) who used dating apps to lure a victim to him. If we remove dating apps from the equation, Kenzie would not have been vulnerable to sexual predators like the suspect.