It's now accepted that he didn't. In truth, such hypothesis was clearly ludicrous from the start, to anyone with half a brain; it was kept dangling just to distract the public, trying to paint it as "just another homo killed by his own weird fetish".
Either this was a cold-war style assassination, or the guy brought home a stranger too many; we'll likely never know the truth about it anyway.
"His decomposing naked remains were found in a red North Face bag, padlocked from the outside, in the bath of the main bedroom's en-suite bathroom."
The mystery being how he managed to lock the bag from the inside.