Puzzles

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The Bungled Heist

After a local bungled heist, five suspects were being interviewed by the police.
Eventually the police managed to get a confession.
Below is a summary of their statements and it turns out that exactly 5 of these statements were true.
Would you make a good detective, try and work out who committed the crime?

Adrian said:
It wasn't Barry
It was Cedric

Barry said:
It wasn't Adrian
It was Derek

Cedric said:
It wasn't Derek
It wasn't Barry

Derek said:
It wasn't Eric
It was Adrian

Eric said:
It wasn't Cedric
It was Derek