Accusation

Accusation is performed at the end of the game. When you know all cards in the envelop, you can solve the murder by making an accusation when it's your round.

Before Accusation

Cards not owned by anyone are in the envelop. When you notice that an item is crossed on the same row, meaning you found that nobody can answer that item, it is in the envelop. Find all 3 items which has all crosses on their row to make accusation.

Another way is to make deductions. If your suggestion can always be answered by a player, you may not use the method above because you can't find the items which nobody has. If you are sure that all players including you owns 5 cards of a category in total (8 for rooms), the remaining one is in the envelop.

Use one method above to find out the suspect, weapon and room cards in envelop one by one to make a correct accusation.

Making Accusation

When it's your round, you can make an accusation before or after making your suggestion inside a room. With enough evidence, you announce to other players:
I accuse it was (suspect) with (weapon) in (room).
After that, secretly see all cards in the envelop to see if they align with your accusation.

Correct Accussation

If the 3 items which you accuse is same as the cards in envelop, you win the game and other players lose. Display and announce the cards in envelop to other players.

Wrong Accusation

If one or more items in the envelop is not the same as what you accuse earlier, you may record wrongly on your notepad or you have not found sufficient evidence. Put all cards back into envelop immediately and do not tell players about the cards. You lose the game but you still need to show cards to other players during their suggestion, until someone make a correct accusation.