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?