Traitor!
Kill a fellow traitor to douse suspicion.

Itl be a blast!
Start to defuse your own bomb but cause it to explode instead

I AM NOT A CROOK!
Type "I am not a traitor" at least once a round for 15 consecutive rounds.

If the round is going smoothly and noone is dead then I wait until everyone is congregated into one room and I pull the trigger on my incinery grenade so noone knows its going off then I wait for it to explode me. Just to cause shit.

BUT I WANNAA KNOOOOWW FOR SURE

I mean you don't want to try and make it like the ship but they had the right idea when it came to pre-occupying players.

Why don't you give them objectives to do, so instead of just finding the killer they work towards a greater goal as well. Such as escaping an island, everyone works together to escape it yet the killer is really trying to just kill everyone...