Logical Puzzle

After a local art theft, six suspects were being interviewed.

Below is a summary of their statements.

Police know that exactly four of them told one lie each and all of the other statements are true.

From this information can you tell who committed the crime?

Alan said:
   It wasn't Brian
   It wasn't Dave
   It wasn't Eddie

Brian said:
   It wasn't Alan
   It wasn't Charlie
   It wasn't Eddie

Charlie said:
   It wasn't Brian
   It wasn't Freddie
   It wasn't Eddie

Dave said:
   It wasn't Alan
   It wasn't Freddie
   It wasn't Charlie

Eddie said:
   It wasn't Charlie
   It wasn't Dave
   It wasn't Freddie

Freddie said:
   It wasn't Charlie
   It wasn't Dave
   It wasn't Alan