The Murder of President Lee

"All Great Neptune's Ocean". Tyr Anasazi goes to apologize to President Sebastian Lee of Castalia for accusing him of genocide earlier in the episode, and out of respect, Lee asks everyone else to leave. The others chitchat for a bit, then Lee is heard yelling, and two shots are fired from a force lance. They rush back into the room to find Lee dead and Tyr unconscious.

Example of:
Locked Room Mystery