TUTOS will only allow the deletion of bugs if the administrator has enabled this feature. This is a feature of the program since old bugreports can help tremendously in fixing new ones by preventing some poor technician from 'reinventing the wheel'. If it is possible to delete a bugreport you first go to the bugreport detail screen (or the bugreport list where you can select 'delete' as one of the possible actions). Clicl on 'modify' to change the bugreport and next click on the 'delete' option in the upper left part of the menu. The usual confirmation message is shown which you can confirm or deny.
The confirmation screen
As far as I can tell that is about all there is to say about the bugreport feature of TUTOS. Tell me, did I exaggerate in the beginning when I said that is was a complete module with lots of handy features? If your answer is 'no' I am really looking forward to your email to the developers describing what you like to have added to the program to answer to your needs.