The 'Behind Mansion Walls' video suggested Jeremy wore a wet suit when committing the massacre. This is not implausible.
He was a keen diver and wanted to be a commercial diver, rather than a farmer after hearing about the money they earn. So no doubt had a wet suit or two available.
He will still be mobile in a wet suit, after all divers and surfers wear them.
A black wet suit will make him harder to spot in the dark.
It will also be easy to wash any incriminating evidence off after committing the massacre. Although as he was gallivanting around Europe for a month after the massacre so had plenty of time to dispose of incriminating evidence.
The police commented how smart Jeremy looked upon arrival at WHF. With several layers of clothing. Certainly not as if he had just got out of bed & rushed over. So it can't be ruled out that he wore these same clothes for the massacre.
I don't believe he wore swimming goggles & flippers on the night. But may well have had a balaclava & gloves on to protect his face from potential injuries.
Do other people believe Jeremy wore a wet suit on the night ?
I'm still waiting for you to use the common sense you were born with Adam. Why would he wear a wetsuit? I think perhaps you need to understand the difference between a wet suit and a dry suit. I dry suit is completely impervious to water. A wet suit on the other hand is what its name suggests, a "wet" suit.
The idea of wearing a wet suit is so that when it gets wet it creates a warm layer of water between the body and the wet suit. This is why surfers use them, so they won't get cold and get hypothermia.
Now in order to operate as it is supposed to it must therefore be absorbent. That means that any liquid whether it be water or blood can easily be absorbed.
So imagine if Jeremy put on a wetsuit to do the murders, what protection would he have gotten if he was splashed with blood? None whatsoever, because it would soak straight through and stain whateve was underneath. So from logical point of view I would be quite confident in stating, no he would not have worn a wetsuit if he were to commit murder that night.