“Joe” is not so smart at all, and he most definitely does not look 28!
Also from memory in his interview, doesn’t he state that when his ex partner arrived they had an argument and then Zlatko became agitated as was worried she was going to call the cops ..... and then he left him in his house and went to the shops (which is weird enough in itself) - only to ‘apparently’ return and see cops everywhere which was the first he had heard of it .... that’s just my recollection, I only watched it once, but if that’s right that makes no sense at all.