Oh boy, this case makes my head spin!
Yep, I thought of Jill Meagher instantly when I read that piece about DJK running to catch up with MH.
Having thought this over (and over) and based on what has been reported, this is what I think happened. MH was supposed to meet someone but they didn't show, hence the waiting around and drinking alone at the pub. DJK had seen MH around and had a crush on him/was stalking him. Seeing MH alone, he decided that was his opportunity and starts a conversation. MH probably recognised DJK. All goes well, they go back to MH's place, there's mutual attraction and they get busy in the bedroom. Then DJK offered his phone number or suggested a date. MH declined, perhaps in an insulting way, and DJK lost the plot. Though I think almost any way MH declined would have felt like a massive rejection to DJK.