Sleep walking

We had two offenders from the same cell with injuries.  When the offenders were questioned, one said he had a bad dream and woke up to find himself fighting with his cellmate.  He claims he was sleepwalking.  When his cellmate was questioned, he said he woke up to find himself fighting his cellmate and was also sleepwalking.  Really?  You expect us to believe that?  Some of the excuses they come up with are so laughable.  If you are going to lie, at least make it believable.