<Snipped quote by Legend>
Hmm... Why don't you try to think up one for us?
Mmmmm...
*Spreads my arms*
A murder happens on a submarine! Four people live on this submarine and have no contact with the outside world. They each have important jobs. The victim made the food, person one did the dishes, person two did the laundry, and person three refilled the chemicals. Person one faints in horror. Person two starts to panic. Person three starts trying to think of a way to escape to the surface. They need all four to control the submarine's ascent 'cause it was designed badly. Person two slaps person one to wake them up, but it doesn't work. Person three suggests throwing the body into the furnace to force the fuel to burn more quickly and get them to the surface without needing all four people, and says they can each sit at the station they controlled on their first day in the submarine, which rotate every week. Person two screams as person three hastily starts dragging the body and shouts that the control code is in the victim's locket. Person three grabs the locket, rushes to the chemical cabinet, sticks the key in, and the key won't budge. But they easily get the cabinet open anyway and throw cat'lysts into the furnace, along with the victim's body. Person two manages to wake up person one and says they need to get to their seats and ascend to the surface. Person one rushes to the chair first, quick to make up for being useless while unconscious. Person three takes their seat, followed by person two. The submarine reaches the surface and all three escape unharmed. The police arrest one of them shortly after based on the testimony of the other two. Who committed the crime and how?