Ein bisschen Mord muss sein

The inspector is trying to find out the murderer by doing several interrogations. Each player has one minute to explain why he isn't the murderer. He must say three words that are written in his book - all the innocents have the same three words they MUST use, but the murderer has three different words. The murderer is trying to pose as innocent by finding and using their three words, while the innocent players are trying to use the murderer's words to appear guilty.