How to check Guest user's log on os x? I leave my Mac at my job and when I come back, someone used it using Guest user.

Is there a way for me to check what this person did when he logged in my mac using Guest user?
All data such as logs that would be stored within the user account's logs directory (~/Library/Logs) is deleted when the user logs out. Other than standard file recovery tools to recover the deleted logs, it's not possible to find out what the Guest user did—this is by design as the Guest user should leave no impact on the machine, and also attempts to stay disassociated from interaction from others.