One comment here. The fact that he was found inside the bathroom with locked door does not mean it was not murder.
Lets say for example, he had a dispute with 2 ladyboys who visited him. He refused to pay, or found our one had a dick etc. Fight ensued and he got killed.
They drag him into the toilet, lock the door from the inside, prop him against the door and then close it from the outside. So, that's how you get a dead body found alone in a locked toilet.
Now lets see of they do a proper forensic analysis. There would likely have been a struggle, so DNA from the ladyboys (hair, blood, fingerprints, semen?? etc would surely be present).