Logic Problems

After a local Post Office burglary, five suspects were being interviewed.

Below is a summary of their statements.

Police know that each of them told the truth in one of the statements and lied in the other.

From this information can you tell who committed the crime?

Brian said:

It wasn't Charles

It was Alan

Derek said:

It was Charles

It wasn't Alan

Charles said:

It was Brian

It wasn't Eric

Alan said:

It was Eric

It wasn't Brian

Eric said:

It was Derek

It was Alan

Hint: Remember that each person told exactly one truth and exactly one lie.