This is yet another question I found on the Internet.
During a recent police investigation, Chief Inspector Stone was interviewing five local villains to try and identify who stole Mrs Archer's cake from the mid-summers fayre. Below is a summary of their statements:
Arnold: it wasn't Edward. It was Brian
Brian: it wasn't Charles. It wasn't Edward
Charles: it was Edward. It wasn't Arnold
Derek: it was Charles. It was Brian
Edward: it was Derek. It wasn't Arnold
It was well known that each suspect told exactly one lie. Can you determine who stole the cake?