Who Was The Thief?

There was a burglary in the Silver City jewelry store last Sunday.

Three suspects: Robert, Scott, and Tommy were caught and questioned.

Each person said, “One of the other two stole it. I did not do it.”

Later on the police found out that Tommy was lying and there was only one thief.

Can you guess who was the thief?

He must be the thief!

He Must Be The Thief!

Who were suspects?

If the statements made by Tommy are false then it suggests that none of other stole it. That means Tommy himself stole it. Also his other statement where is claiming that he didn't do that is also a lie.

In short, Tommy must be the thief.